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Finding the Fourth Proportional to 866.74, 1,299.36 and 433.66

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Solution

The fourth proportional to 866.74, 1,299.36 and 433.66 is: 650.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.74 : 1,299.36 = 433.66 : x
  2. Step 2: Convert to fraction form
    866.74/1,299.36 = 433.66/x
  3. Step 3: Cross multiply
    866.74x = 1,299.36 × 433.66
  4. Step 4: Simplify right side
    866.74x = 563,480.46
  5. Step 5: Solve for x
    x = 563,480.46/866.74
  6. Step 6: Final answer
    x = 650.11

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.