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Finding the Fourth Proportional to 521,866.62, 720,176.04 and 317,917.53

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Solution

The fourth proportional to 521,866.62, 720,176.04 and 317,917.53 is: 438,726.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,866.62 : 720,176.04 = 317,917.53 : x
  2. Step 2: Convert to fraction form
    521,866.62/720,176.04 = 317,917.53/x
  3. Step 3: Cross multiply
    521,866.62x = 720,176.04 × 317,917.53
  4. Step 4: Simplify right side
    521,866.62x = 228,956,587,801.98
  5. Step 5: Solve for x
    x = 228,956,587,801.98/521,866.62
  6. Step 6: Final answer
    x = 438,726.25

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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.