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Finding the Fourth Proportional to 837.95, 1,255.55 and 426.52

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Solution

The fourth proportional to 837.95, 1,255.55 and 426.52 is: 639.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.95 : 1,255.55 = 426.52 : x
  2. Step 2: Convert to fraction form
    837.95/1,255.55 = 426.52/x
  3. Step 3: Cross multiply
    837.95x = 1,255.55 × 426.52
  4. Step 4: Simplify right side
    837.95x = 535,511.96
  5. Step 5: Solve for x
    x = 535,511.96/837.95
  6. Step 6: Final answer
    x = 639.08

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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.