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Finding the Fourth Proportional to 520,908.60, 781,406.10 and 165,912.60

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Solution

The fourth proportional to 520,908.60, 781,406.10 and 165,912.60 is: 248,882.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,908.60 : 781,406.10 = 165,912.60 : x
  2. Step 2: Convert to fraction form
    520,908.60/781,406.10 = 165,912.60/x
  3. Step 3: Cross multiply
    520,908.60x = 781,406.10 × 165,912.60
  4. Step 4: Simplify right side
    520,908.60x = 129,645,117,706.86
  5. Step 5: Solve for x
    x = 129,645,117,706.86/520,908.60
  6. Step 6: Final answer
    x = 248,882.66

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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.