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Finding the Fourth Proportional to 626,761,230.33, 864,018,914.25 and 438,003,483.78

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Solution

The fourth proportional to 626,761,230.33, 864,018,914.25 and 438,003,483.78 is: 603,807,759.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,761,230.33 : 864,018,914.25 = 438,003,483.78 : x
  2. Step 2: Convert to fraction form
    626,761,230.33/864,018,914.25 = 438,003,483.78/x
  3. Step 3: Cross multiply
    626,761,230.33x = 864,018,914.25 × 438,003,483.78
  4. Step 4: Simplify right side
    626,761,230.33x = 378,443,294,493,313,088
  5. Step 5: Solve for x
    x = 378,443,294,493,313,088/626,761,230.33
  6. Step 6: Final answer
    x = 603,807,759.92

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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.