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Finding the Fourth Proportional to 689.52, 951.12 and 602.40

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Solution

The fourth proportional to 689.52, 951.12 and 602.40 is: 830.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.52 : 951.12 = 602.40 : x
  2. Step 2: Convert to fraction form
    689.52/951.12 = 602.40/x
  3. Step 3: Cross multiply
    689.52x = 951.12 × 602.40
  4. Step 4: Simplify right side
    689.52x = 572,954.69
  5. Step 5: Solve for x
    x = 572,954.69/689.52
  6. Step 6: Final answer
    x = 830.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.