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Finding the Fourth Proportional to 521,841.87, 720,580.67 and 392,556.25

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Solution

The fourth proportional to 521,841.87, 720,580.67 and 392,556.25 is: 542,057.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,841.87 : 720,580.67 = 392,556.25 : x
  2. Step 2: Convert to fraction form
    521,841.87/720,580.67 = 392,556.25/x
  3. Step 3: Cross multiply
    521,841.87x = 720,580.67 × 392,556.25
  4. Step 4: Simplify right side
    521,841.87x = 282,868,445,637.69
  5. Step 5: Solve for x
    x = 282,868,445,637.69/521,841.87
  6. Step 6: Final answer
    x = 542,057.78

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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.