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Finding the Fourth Proportional to 487.22, 672.36 and 298.11

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Solution

The fourth proportional to 487.22, 672.36 and 298.11 is: 411.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.22 : 672.36 = 298.11 : x
  2. Step 2: Convert to fraction form
    487.22/672.36 = 298.11/x
  3. Step 3: Cross multiply
    487.22x = 672.36 × 298.11
  4. Step 4: Simplify right side
    487.22x = 200,437.24
  5. Step 5: Solve for x
    x = 200,437.24/487.22
  6. Step 6: Final answer
    x = 411.39

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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.