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Finding the Fourth Proportional to 966.77, 1,331.67 and 817.22

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Solution

The fourth proportional to 966.77, 1,331.67 and 817.22 is: 1,125.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.77 : 1,331.67 = 817.22 : x
  2. Step 2: Convert to fraction form
    966.77/1,331.67 = 817.22/x
  3. Step 3: Cross multiply
    966.77x = 1,331.67 × 817.22
  4. Step 4: Simplify right side
    966.77x = 1,088,273.75
  5. Step 5: Solve for x
    x = 1,088,273.75/966.77
  6. Step 6: Final answer
    x = 1,125.68

Related Problems

Find fourth proportional to 483.38, 665.84 and 408.61
Half scale
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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.