Home / 644,436,011.10-966,654,016.65-399,547,998.30

Finding the Fourth Proportional to 644,436,011.10, 966,654,016.65 and 399,547,998.30

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Solution

The fourth proportional to 644,436,011.10, 966,654,016.65 and 399,547,998.30 is: 599,321,997.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,436,011.10 : 966,654,016.65 = 399,547,998.30 : x
  2. Step 2: Convert to fraction form
    644,436,011.10/966,654,016.65 = 399,547,998.30/x
  3. Step 3: Cross multiply
    644,436,011.10x = 966,654,016.65 × 399,547,998.30
  4. Step 4: Simplify right side
    644,436,011.10x = 386,224,677,401,162,368
  5. Step 5: Solve for x
    x = 386,224,677,401,162,368/644,436,011.10
  6. Step 6: Final answer
    x = 599,321,997.45

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Double scale
Find fourth proportional to 644,436,012.10, 966,654,018.15 and 399,547,999.30
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.