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Finding the Fourth Proportional to 485.56, 674 and 474.04

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Solution

The fourth proportional to 485.56, 674 and 474.04 is: 658.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.56 : 674 = 474.04 : x
  2. Step 2: Convert to fraction form
    485.56/674 = 474.04/x
  3. Step 3: Cross multiply
    485.56x = 674 × 474.04
  4. Step 4: Simplify right side
    485.56x = 319,502.96
  5. Step 5: Solve for x
    x = 319,502.96/485.56
  6. Step 6: Final answer
    x = 658.01

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.