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Finding the Fourth Proportional to 1,144.47, 1,716.80 and 322.74

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Solution

The fourth proportional to 1,144.47, 1,716.80 and 322.74 is: 484.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.47 : 1,716.80 = 322.74 : x
  2. Step 2: Convert to fraction form
    1,144.47/1,716.80 = 322.74/x
  3. Step 3: Cross multiply
    1,144.47x = 1,716.80 × 322.74
  4. Step 4: Simplify right side
    1,144.47x = 554,078.42
  5. Step 5: Solve for x
    x = 554,078.42/1,144.47
  6. Step 6: Final answer
    x = 484.14

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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.