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Finding the Fourth Proportional to 492,436.80, 738,644.40 and 137,440.80

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Solution

The fourth proportional to 492,436.80, 738,644.40 and 137,440.80 is: 206,158.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,436.80 : 738,644.40 = 137,440.80 : x
  2. Step 2: Convert to fraction form
    492,436.80/738,644.40 = 137,440.80/x
  3. Step 3: Cross multiply
    492,436.80x = 738,644.40 × 137,440.80
  4. Step 4: Simplify right side
    492,436.80x = 101,519,877,251.52
  5. Step 5: Solve for x
    x = 101,519,877,251.52/492,436.80
  6. Step 6: Final answer
    x = 206,158.19

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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.