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Finding the Fourth Proportional to 961.85, 1,445.18 and 615.34

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Solution

The fourth proportional to 961.85, 1,445.18 and 615.34 is: 924.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.85 : 1,445.18 = 615.34 : x
  2. Step 2: Convert to fraction form
    961.85/1,445.18 = 615.34/x
  3. Step 3: Cross multiply
    961.85x = 1,445.18 × 615.34
  4. Step 4: Simplify right side
    961.85x = 889,275.79
  5. Step 5: Solve for x
    x = 889,275.79/961.85
  6. Step 6: Final answer
    x = 924.54

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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.