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Finding the Fourth Proportional to 498.06, 687.20 and 301.50

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Solution

The fourth proportional to 498.06, 687.20 and 301.50 is: 415.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.06 : 687.20 = 301.50 : x
  2. Step 2: Convert to fraction form
    498.06/687.20 = 301.50/x
  3. Step 3: Cross multiply
    498.06x = 687.20 × 301.50
  4. Step 4: Simplify right side
    498.06x = 207,189.29
  5. Step 5: Solve for x
    x = 207,189.29/498.06
  6. Step 6: Final answer
    x = 415.99

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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.