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Finding the Fourth Proportional to 487.49, 672.74 and 266.45

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Solution

The fourth proportional to 487.49, 672.74 and 266.45 is: 367.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.49 : 672.74 = 266.45 : x
  2. Step 2: Convert to fraction form
    487.49/672.74 = 266.45/x
  3. Step 3: Cross multiply
    487.49x = 672.74 × 266.45
  4. Step 4: Simplify right side
    487.49x = 179,251.57
  5. Step 5: Solve for x
    x = 179,251.57/487.49
  6. Step 6: Final answer
    x = 367.70

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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.