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Finding the Fourth Proportional to 713.26, 1,068.95 and 615.75

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Solution

The fourth proportional to 713.26, 1,068.95 and 615.75 is: 922.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.26 : 1,068.95 = 615.75 : x
  2. Step 2: Convert to fraction form
    713.26/1,068.95 = 615.75/x
  3. Step 3: Cross multiply
    713.26x = 1,068.95 × 615.75
  4. Step 4: Simplify right side
    713.26x = 658,206.04
  5. Step 5: Solve for x
    x = 658,206.04/713.26
  6. Step 6: Final answer
    x = 922.82

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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.