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Finding the Fourth Proportional to 487.31, 672.50 and 266.27

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Solution

The fourth proportional to 487.31, 672.50 and 266.27 is: 367.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.31 : 672.50 = 266.27 : x
  2. Step 2: Convert to fraction form
    487.31/672.50 = 266.27/x
  3. Step 3: Cross multiply
    487.31x = 672.50 × 266.27
  4. Step 4: Simplify right side
    487.31x = 179,063.21
  5. Step 5: Solve for x
    x = 179,063.21/487.31
  6. Step 6: Final answer
    x = 367.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.