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Finding the Fourth Proportional to 836.76, 1,154.88 and 557

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Solution

The fourth proportional to 836.76, 1,154.88 and 557 is: 768.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.76 : 1,154.88 = 557 : x
  2. Step 2: Convert to fraction form
    836.76/1,154.88 = 557/x
  3. Step 3: Cross multiply
    836.76x = 1,154.88 × 557
  4. Step 4: Simplify right side
    836.76x = 643,268.16
  5. Step 5: Solve for x
    x = 643,268.16/836.76
  6. Step 6: Final answer
    x = 768.76

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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.