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Finding the Fourth Proportional to 837.18, 1,253.80 and 425.30

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Solution

The fourth proportional to 837.18, 1,253.80 and 425.30 is: 636.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.18 : 1,253.80 = 425.30 : x
  2. Step 2: Convert to fraction form
    837.18/1,253.80 = 425.30/x
  3. Step 3: Cross multiply
    837.18x = 1,253.80 × 425.30
  4. Step 4: Simplify right side
    837.18x = 533,232.74
  5. Step 5: Solve for x
    x = 533,232.74/837.18
  6. Step 6: Final answer
    x = 636.94

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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.