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Finding the Fourth Proportional to 521,230.70, 781,906.80 and 166,280.60

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Solution

The fourth proportional to 521,230.70, 781,906.80 and 166,280.60 is: 249,440.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,230.70 : 781,906.80 = 166,280.60 : x
  2. Step 2: Convert to fraction form
    521,230.70/781,906.80 = 166,280.60/x
  3. Step 3: Cross multiply
    521,230.70x = 781,906.80 × 166,280.60
  4. Step 4: Simplify right side
    521,230.70x = 130,015,931,848.08
  5. Step 5: Solve for x
    x = 130,015,931,848.08/521,230.70
  6. Step 6: Final answer
    x = 249,440.28

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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.