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Finding the Fourth Proportional to 821.49, 1,232.26 and 560.87

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Solution

The fourth proportional to 821.49, 1,232.26 and 560.87 is: 841.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    821.49 : 1,232.26 = 560.87 : x
  2. Step 2: Convert to fraction form
    821.49/1,232.26 = 560.87/x
  3. Step 3: Cross multiply
    821.49x = 1,232.26 × 560.87
  4. Step 4: Simplify right side
    821.49x = 691,144.81
  5. Step 5: Solve for x
    x = 691,144.81/821.49
  6. Step 6: Final answer
    x = 841.33

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.