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Finding the Fourth Proportional to 844.78, 1,265.46 and 432.70

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Solution

The fourth proportional to 844.78, 1,265.46 and 432.70 is: 648.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.78 : 1,265.46 = 432.70 : x
  2. Step 2: Convert to fraction form
    844.78/1,265.46 = 432.70/x
  3. Step 3: Cross multiply
    844.78x = 1,265.46 × 432.70
  4. Step 4: Simplify right side
    844.78x = 547,564.54
  5. Step 5: Solve for x
    x = 547,564.54/844.78
  6. Step 6: Final answer
    x = 648.17

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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.