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Finding the Fourth Proportional to 520,737.70, 781,106.55 and 165,787.60

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Solution

The fourth proportional to 520,737.70, 781,106.55 and 165,787.60 is: 248,681.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,737.70 : 781,106.55 = 165,787.60 : x
  2. Step 2: Convert to fraction form
    520,737.70/781,106.55 = 165,787.60/x
  3. Step 3: Cross multiply
    520,737.70x = 781,106.55 × 165,787.60
  4. Step 4: Simplify right side
    520,737.70x = 129,497,780,268.78
  5. Step 5: Solve for x
    x = 129,497,780,268.78/520,737.70
  6. Step 6: Final answer
    x = 248,681.40

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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.