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Finding the Fourth Proportional to 626,761,309.52, 864,019,022.64 and 438,003,565.40

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Solution

The fourth proportional to 626,761,309.52, 864,019,022.64 and 438,003,565.40 is: 603,807,871.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,761,309.52 : 864,019,022.64 = 438,003,565.40 : x
  2. Step 2: Convert to fraction form
    626,761,309.52/864,019,022.64 = 438,003,565.40/x
  3. Step 3: Cross multiply
    626,761,309.52x = 864,019,022.64 × 438,003,565.40
  4. Step 4: Simplify right side
    626,761,309.52x = 378,443,412,489,743,296
  5. Step 5: Solve for x
    x = 378,443,412,489,743,296/626,761,309.52
  6. Step 6: Final answer
    x = 603,807,871.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.