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Finding the Fourth Proportional to 866.26, 1,299.18 and 289.13

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Solution

The fourth proportional to 866.26, 1,299.18 and 289.13 is: 433.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.26 : 1,299.18 = 289.13 : x
  2. Step 2: Convert to fraction form
    866.26/1,299.18 = 289.13/x
  3. Step 3: Cross multiply
    866.26x = 1,299.18 × 289.13
  4. Step 4: Simplify right side
    866.26x = 375,631.91
  5. Step 5: Solve for x
    x = 375,631.91/866.26
  6. Step 6: Final answer
    x = 433.63

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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.