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Finding the Fourth Proportional to 645,655.31, 888,976.17 and 548,654.57

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Solution

The fourth proportional to 645,655.31, 888,976.17 and 548,654.57 is: 755,419.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,655.31 : 888,976.17 = 548,654.57 : x
  2. Step 2: Convert to fraction form
    645,655.31/888,976.17 = 548,654.57/x
  3. Step 3: Cross multiply
    645,655.31x = 888,976.17 × 548,654.57
  4. Step 4: Simplify right side
    645,655.31x = 487,740,833,846.72
  5. Step 5: Solve for x
    x = 487,740,833,846.72/645,655.31
  6. Step 6: Final answer
    x = 755,419.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.