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Finding the Fourth Proportional to 577,449.30, 865,189.80 and 492,812.40

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Solution

The fourth proportional to 577,449.30, 865,189.80 and 492,812.40 is: 738,378.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,449.30 : 865,189.80 = 492,812.40 : x
  2. Step 2: Convert to fraction form
    577,449.30/865,189.80 = 492,812.40/x
  3. Step 3: Cross multiply
    577,449.30x = 865,189.80 × 492,812.40
  4. Step 4: Simplify right side
    577,449.30x = 426,376,261,793.52
  5. Step 5: Solve for x
    x = 426,376,261,793.52/577,449.30
  6. Step 6: Final answer
    x = 738,378.70

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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.