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Finding the Fourth Proportional to 762.95, 1,144.15 and 324.23

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Solution

The fourth proportional to 762.95, 1,144.15 and 324.23 is: 486.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.95 : 1,144.15 = 324.23 : x
  2. Step 2: Convert to fraction form
    762.95/1,144.15 = 324.23/x
  3. Step 3: Cross multiply
    762.95x = 1,144.15 × 324.23
  4. Step 4: Simplify right side
    762.95x = 370,964.08
  5. Step 5: Solve for x
    x = 370,964.08/762.95
  6. Step 6: Final answer
    x = 486.22

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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.