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Finding the Fourth Proportional to 622,704,670.80, 934,057,006.20 and 393,689,029.20

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Solution

The fourth proportional to 622,704,670.80, 934,057,006.20 and 393,689,029.20 is: 590,533,543.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,704,670.80 : 934,057,006.20 = 393,689,029.20 : x
  2. Step 2: Convert to fraction form
    622,704,670.80/934,057,006.20 = 393,689,029.20/x
  3. Step 3: Cross multiply
    622,704,670.80x = 934,057,006.20 × 393,689,029.20
  4. Step 4: Simplify right side
    622,704,670.80x = 367,727,995,988,336,384
  5. Step 5: Solve for x
    x = 367,727,995,988,336,384/622,704,670.80
  6. Step 6: Final answer
    x = 590,533,543.80

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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.