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Finding the Fourth Proportional to 763.15, 1,144.67 and 243.17

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Solution

The fourth proportional to 763.15, 1,144.67 and 243.17 is: 364.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.15 : 1,144.67 = 243.17 : x
  2. Step 2: Convert to fraction form
    763.15/1,144.67 = 243.17/x
  3. Step 3: Cross multiply
    763.15x = 1,144.67 × 243.17
  4. Step 4: Simplify right side
    763.15x = 278,347.67
  5. Step 5: Solve for x
    x = 278,347.67/763.15
  6. Step 6: Final answer
    x = 364.73

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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.