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Finding the Fourth Proportional to 498.56, 686.72 and 474.24

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Solution

The fourth proportional to 498.56, 686.72 and 474.24 is: 653.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.56 : 686.72 = 474.24 : x
  2. Step 2: Convert to fraction form
    498.56/686.72 = 474.24/x
  3. Step 3: Cross multiply
    498.56x = 686.72 × 474.24
  4. Step 4: Simplify right side
    498.56x = 325,670.09
  5. Step 5: Solve for x
    x = 325,670.09/498.56
  6. Step 6: Final answer
    x = 653.22

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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.