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Finding the Fourth Proportional to 866.12, 1,299.18 and 433.64

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Solution

The fourth proportional to 866.12, 1,299.18 and 433.64 is: 650.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.12 : 1,299.18 = 433.64 : x
  2. Step 2: Convert to fraction form
    866.12/1,299.18 = 433.64/x
  3. Step 3: Cross multiply
    866.12x = 1,299.18 × 433.64
  4. Step 4: Simplify right side
    866.12x = 563,376.42
  5. Step 5: Solve for x
    x = 563,376.42/866.12
  6. Step 6: Final answer
    x = 650.46

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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.