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Finding the Fourth Proportional to 521,640.90, 731,871.90 and 521,640.90

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Solution

The fourth proportional to 521,640.90, 731,871.90 and 521,640.90 is: 731,871.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,640.90 : 731,871.90 = 521,640.90 : x
  2. Step 2: Convert to fraction form
    521,640.90/731,871.90 = 521,640.90/x
  3. Step 3: Cross multiply
    521,640.90x = 731,871.90 × 521,640.90
  4. Step 4: Simplify right side
    521,640.90x = 381,774,316,600.71
  5. Step 5: Solve for x
    x = 381,774,316,600.71/521,640.90
  6. Step 6: Final answer
    x = 731,871.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.