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Finding the Fourth Proportional to 492,708.60, 739,062.90 and 279,257.40

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Solution

The fourth proportional to 492,708.60, 739,062.90 and 279,257.40 is: 418,886.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,708.60 : 739,062.90 = 279,257.40 : x
  2. Step 2: Convert to fraction form
    492,708.60/739,062.90 = 279,257.40/x
  3. Step 3: Cross multiply
    492,708.60x = 739,062.90 × 279,257.40
  4. Step 4: Simplify right side
    492,708.60x = 206,388,783,890.46
  5. Step 5: Solve for x
    x = 206,388,783,890.46/492,708.60
  6. Step 6: Final answer
    x = 418,886.10

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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.