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Finding the Fourth Proportional to 837.60, 1,255.35 and 398.49

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Solution

The fourth proportional to 837.60, 1,255.35 and 398.49 is: 597.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.60 : 1,255.35 = 398.49 : x
  2. Step 2: Convert to fraction form
    837.60/1,255.35 = 398.49/x
  3. Step 3: Cross multiply
    837.60x = 1,255.35 × 398.49
  4. Step 4: Simplify right side
    837.60x = 500,244.42
  5. Step 5: Solve for x
    x = 500,244.42/837.60
  6. Step 6: Final answer
    x = 597.24

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1.5x scale

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.