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Finding the Fourth Proportional to 836.62, 1,152.05 and 717.71

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Solution

The fourth proportional to 836.62, 1,152.05 and 717.71 is: 988.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.62 : 1,152.05 = 717.71 : x
  2. Step 2: Convert to fraction form
    836.62/1,152.05 = 717.71/x
  3. Step 3: Cross multiply
    836.62x = 1,152.05 × 717.71
  4. Step 4: Simplify right side
    836.62x = 826,828.46
  5. Step 5: Solve for x
    x = 826,828.46/836.62
  6. Step 6: Final answer
    x = 988.30

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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.