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Finding the Fourth Proportional to 689.43, 951.54 and 468.75

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Solution

The fourth proportional to 689.43, 951.54 and 468.75 is: 646.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.43 : 951.54 = 468.75 : x
  2. Step 2: Convert to fraction form
    689.43/951.54 = 468.75/x
  3. Step 3: Cross multiply
    689.43x = 951.54 × 468.75
  4. Step 4: Simplify right side
    689.43x = 446,034.38
  5. Step 5: Solve for x
    x = 446,034.38/689.43
  6. Step 6: Final answer
    x = 646.96

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1.5x scale

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.