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Finding the Fourth Proportional to 836.92, 1,154.82 and 557.57

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Solution

The fourth proportional to 836.92, 1,154.82 and 557.57 is: 769.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.92 : 1,154.82 = 557.57 : x
  2. Step 2: Convert to fraction form
    836.92/1,154.82 = 557.57/x
  3. Step 3: Cross multiply
    836.92x = 1,154.82 × 557.57
  4. Step 4: Simplify right side
    836.92x = 643,892.99
  5. Step 5: Solve for x
    x = 643,892.99/836.92
  6. Step 6: Final answer
    x = 769.36

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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.