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Finding the Fourth Proportional to 1,355.35, 2,031.46 and 615.52

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Solution

The fourth proportional to 1,355.35, 2,031.46 and 615.52 is: 922.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.35 : 2,031.46 = 615.52 : x
  2. Step 2: Convert to fraction form
    1,355.35/2,031.46 = 615.52/x
  3. Step 3: Cross multiply
    1,355.35x = 2,031.46 × 615.52
  4. Step 4: Simplify right side
    1,355.35x = 1,250,404.26
  5. Step 5: Solve for x
    x = 1,250,404.26/1,355.35
  6. Step 6: Final answer
    x = 922.57

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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.