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Finding the Fourth Proportional to 979.74, 1,469.54 and 249.32

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Solution

The fourth proportional to 979.74, 1,469.54 and 249.32 is: 373.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.74 : 1,469.54 = 249.32 : x
  2. Step 2: Convert to fraction form
    979.74/1,469.54 = 249.32/x
  3. Step 3: Cross multiply
    979.74x = 1,469.54 × 249.32
  4. Step 4: Simplify right side
    979.74x = 366,385.71
  5. Step 5: Solve for x
    x = 366,385.71/979.74
  6. Step 6: Final answer
    x = 373.96

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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.