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Finding the Fourth Proportional to 577,688.40, 865,366.20 and 328,078.80

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Solution

The fourth proportional to 577,688.40, 865,366.20 and 328,078.80 is: 491,455.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,688.40 : 865,366.20 = 328,078.80 : x
  2. Step 2: Convert to fraction form
    577,688.40/865,366.20 = 328,078.80/x
  3. Step 3: Cross multiply
    577,688.40x = 865,366.20 × 328,078.80
  4. Step 4: Simplify right side
    577,688.40x = 283,908,304,456.56
  5. Step 5: Solve for x
    x = 283,908,304,456.56/577,688.40
  6. Step 6: Final answer
    x = 491,455.78

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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.