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Finding the Fourth Proportional to 689.68, 951.61 and 503.27

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Solution

The fourth proportional to 689.68, 951.61 and 503.27 is: 694.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.68 : 951.61 = 503.27 : x
  2. Step 2: Convert to fraction form
    689.68/951.61 = 503.27/x
  3. Step 3: Cross multiply
    689.68x = 951.61 × 503.27
  4. Step 4: Simplify right side
    689.68x = 478,915.16
  5. Step 5: Solve for x
    x = 478,915.16/689.68
  6. Step 6: Final answer
    x = 694.40

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Double scale
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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.