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Finding the Fourth Proportional to 663.08, 992.18 and 374.72

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Solution

The fourth proportional to 663.08, 992.18 and 374.72 is: 560.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.08 : 992.18 = 374.72 : x
  2. Step 2: Convert to fraction form
    663.08/992.18 = 374.72/x
  3. Step 3: Cross multiply
    663.08x = 992.18 × 374.72
  4. Step 4: Simplify right side
    663.08x = 371,785.67
  5. Step 5: Solve for x
    x = 371,785.67/663.08
  6. Step 6: Final answer
    x = 560.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.