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Finding the Fourth Proportional to 521,335.92, 781,990.20 and 166,371.60

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Solution

The fourth proportional to 521,335.92, 781,990.20 and 166,371.60 is: 249,553.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,335.92 : 781,990.20 = 166,371.60 : x
  2. Step 2: Convert to fraction form
    521,335.92/781,990.20 = 166,371.60/x
  3. Step 3: Cross multiply
    521,335.92x = 781,990.20 × 166,371.60
  4. Step 4: Simplify right side
    521,335.92x = 130,100,960,758.32
  5. Step 5: Solve for x
    x = 130,100,960,758.32/521,335.92
  6. Step 6: Final answer
    x = 249,553.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.