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Finding the Fourth Proportional to 492,720.60, 739,080.90 and 386,432.40

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Solution

The fourth proportional to 492,720.60, 739,080.90 and 386,432.40 is: 579,648.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,720.60 : 739,080.90 = 386,432.40 : x
  2. Step 2: Convert to fraction form
    492,720.60/739,080.90 = 386,432.40/x
  3. Step 3: Cross multiply
    492,720.60x = 739,080.90 × 386,432.40
  4. Step 4: Simplify right side
    492,720.60x = 285,604,805,981.16
  5. Step 5: Solve for x
    x = 285,604,805,981.16/492,720.60
  6. Step 6: Final answer
    x = 579,648.60

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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.