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Finding the Fourth Proportional to 492,759.30, 739,138.95 and 439,615.20

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Solution

The fourth proportional to 492,759.30, 739,138.95 and 439,615.20 is: 659,422.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,759.30 : 739,138.95 = 439,615.20 : x
  2. Step 2: Convert to fraction form
    492,759.30/739,138.95 = 439,615.20/x
  3. Step 3: Cross multiply
    492,759.30x = 739,138.95 × 439,615.20
  4. Step 4: Simplify right side
    492,759.30x = 324,936,717,332.04
  5. Step 5: Solve for x
    x = 324,936,717,332.04/492,759.30
  6. Step 6: Final answer
    x = 659,422.80

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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.