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Finding the Fourth Proportional to 843.42, 1,265.50 and 432.34

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Solution

The fourth proportional to 843.42, 1,265.50 and 432.34 is: 648.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.42 : 1,265.50 = 432.34 : x
  2. Step 2: Convert to fraction form
    843.42/1,265.50 = 432.34/x
  3. Step 3: Cross multiply
    843.42x = 1,265.50 × 432.34
  4. Step 4: Simplify right side
    843.42x = 547,126.27
  5. Step 5: Solve for x
    x = 547,126.27/843.42
  6. Step 6: Final answer
    x = 648.70

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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.