Home / 644,436,003.60-966,654,005.40-399,547,990.80

Finding the Fourth Proportional to 644,436,003.60, 966,654,005.40 and 399,547,990.80

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Solution

The fourth proportional to 644,436,003.60, 966,654,005.40 and 399,547,990.80 is: 599,321,986.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,436,003.60 : 966,654,005.40 = 399,547,990.80 : x
  2. Step 2: Convert to fraction form
    644,436,003.60/966,654,005.40 = 399,547,990.80/x
  3. Step 3: Cross multiply
    644,436,003.60x = 966,654,005.40 × 399,547,990.80
  4. Step 4: Simplify right side
    644,436,003.60x = 386,224,665,656,342,336
  5. Step 5: Solve for x
    x = 386,224,665,656,342,336/644,436,003.60
  6. Step 6: Final answer
    x = 599,321,986.20

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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.