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Finding the Fourth Proportional to 521,763.60, 782,542.74 and 166,681.92

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Solution

The fourth proportional to 521,763.60, 782,542.74 and 166,681.92 is: 249,990.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,763.60 : 782,542.74 = 166,681.92 : x
  2. Step 2: Convert to fraction form
    521,763.60/782,542.74 = 166,681.92/x
  3. Step 3: Cross multiply
    521,763.60x = 782,542.74 × 166,681.92
  4. Step 4: Simplify right side
    521,763.60x = 130,435,726,385.26
  5. Step 5: Solve for x
    x = 130,435,726,385.26/521,763.60
  6. Step 6: Final answer
    x = 249,990.08

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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.