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Finding the Fourth Proportional to 866.17, 1,298.26 and 448.53

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Solution

The fourth proportional to 866.17, 1,298.26 and 448.53 is: 672.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.17 : 1,298.26 = 448.53 : x
  2. Step 2: Convert to fraction form
    866.17/1,298.26 = 448.53/x
  3. Step 3: Cross multiply
    866.17x = 1,298.26 × 448.53
  4. Step 4: Simplify right side
    866.17x = 582,308.56
  5. Step 5: Solve for x
    x = 582,308.56/866.17
  6. Step 6: Final answer
    x = 672.28

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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.