Home / 644,436,002.10-966,654,003.15-399,547,989.30

Finding the Fourth Proportional to 644,436,002.10, 966,654,003.15 and 399,547,989.30

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Solution

The fourth proportional to 644,436,002.10, 966,654,003.15 and 399,547,989.30 is: 599,321,983.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,436,002.10 : 966,654,003.15 = 399,547,989.30 : x
  2. Step 2: Convert to fraction form
    644,436,002.10/966,654,003.15 = 399,547,989.30/x
  3. Step 3: Cross multiply
    644,436,002.10x = 966,654,003.15 × 399,547,989.30
  4. Step 4: Simplify right side
    644,436,002.10x = 386,224,663,307,378,368
  5. Step 5: Solve for x
    x = 386,224,663,307,378,368/644,436,002.10
  6. Step 6: Final answer
    x = 599,321,983.95

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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.