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Finding the Fourth Proportional to 498.18, 687.12 and 301.56

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Solution

The fourth proportional to 498.18, 687.12 and 301.56 is: 415.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.18 : 687.12 = 301.56 : x
  2. Step 2: Convert to fraction form
    498.18/687.12 = 301.56/x
  3. Step 3: Cross multiply
    498.18x = 687.12 × 301.56
  4. Step 4: Simplify right side
    498.18x = 207,207.91
  5. Step 5: Solve for x
    x = 207,207.91/498.18
  6. Step 6: Final answer
    x = 415.93

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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.