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Finding the Fourth Proportional to 663,552,398.80, 995,328,598.20 and 620,554,229.20

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Solution

The fourth proportional to 663,552,398.80, 995,328,598.20 and 620,554,229.20 is: 930,831,343.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,552,398.80 : 995,328,598.20 = 620,554,229.20 : x
  2. Step 2: Convert to fraction form
    663,552,398.80/995,328,598.20 = 620,554,229.20/x
  3. Step 3: Cross multiply
    663,552,398.80x = 995,328,598.20 × 620,554,229.20
  4. Step 4: Simplify right side
    663,552,398.80x = 617,655,371,056,717,568
  5. Step 5: Solve for x
    x = 617,655,371,056,717,568/663,552,398.80
  6. Step 6: Final answer
    x = 930,831,343.80

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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.