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Finding the Fourth Proportional to 836.52, 1,254.84 and 426.48

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Solution

The fourth proportional to 836.52, 1,254.84 and 426.48 is: 639.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.52 : 1,254.84 = 426.48 : x
  2. Step 2: Convert to fraction form
    836.52/1,254.84 = 426.48/x
  3. Step 3: Cross multiply
    836.52x = 1,254.84 × 426.48
  4. Step 4: Simplify right side
    836.52x = 535,164.16
  5. Step 5: Solve for x
    x = 535,164.16/836.52
  6. Step 6: Final answer
    x = 639.75

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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.