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Finding the Fourth Proportional to 837.59, 1,256.68 and 398.97

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Solution

The fourth proportional to 837.59, 1,256.68 and 398.97 is: 598.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.59 : 1,256.68 = 398.97 : x
  2. Step 2: Convert to fraction form
    837.59/1,256.68 = 398.97/x
  3. Step 3: Cross multiply
    837.59x = 1,256.68 × 398.97
  4. Step 4: Simplify right side
    837.59x = 501,378.12
  5. Step 5: Solve for x
    x = 501,378.12/837.59
  6. Step 6: Final answer
    x = 598.60

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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.