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Finding the Fourth Proportional to 762.73, 1,143.98 and 324.15

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Solution

The fourth proportional to 762.73, 1,143.98 and 324.15 is: 486.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.73 : 1,143.98 = 324.15 : x
  2. Step 2: Convert to fraction form
    762.73/1,143.98 = 324.15/x
  3. Step 3: Cross multiply
    762.73x = 1,143.98 × 324.15
  4. Step 4: Simplify right side
    762.73x = 370,821.12
  5. Step 5: Solve for x
    x = 370,821.12/762.73
  6. Step 6: Final answer
    x = 486.18

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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.