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Finding the Fourth Proportional to 1,162.12, 1,743.90 and 478.12

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Solution

The fourth proportional to 1,162.12, 1,743.90 and 478.12 is: 717.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,162.12 : 1,743.90 = 478.12 : x
  2. Step 2: Convert to fraction form
    1,162.12/1,743.90 = 478.12/x
  3. Step 3: Cross multiply
    1,162.12x = 1,743.90 × 478.12
  4. Step 4: Simplify right side
    1,162.12x = 833,793.47
  5. Step 5: Solve for x
    x = 833,793.47/1,162.12
  6. Step 6: Final answer
    x = 717.48

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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.