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Finding the Fourth Proportional to 520,845.30, 781,311.15 and 165,849.30

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Solution

The fourth proportional to 520,845.30, 781,311.15 and 165,849.30 is: 248,787.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,845.30 : 781,311.15 = 165,849.30 : x
  2. Step 2: Convert to fraction form
    520,845.30/781,311.15 = 165,849.30/x
  3. Step 3: Cross multiply
    520,845.30x = 781,311.15 × 165,849.30
  4. Step 4: Simplify right side
    520,845.30x = 129,579,907,309.70
  5. Step 5: Solve for x
    x = 129,579,907,309.70/520,845.30
  6. Step 6: Final answer
    x = 248,787.71

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1.5x scale

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.