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Finding the Fourth Proportional to 1,144.33, 1,715.98 and 486.18

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Solution

The fourth proportional to 1,144.33, 1,715.98 and 486.18 is: 729.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.33 : 1,715.98 = 486.18 : x
  2. Step 2: Convert to fraction form
    1,144.33/1,715.98 = 486.18/x
  3. Step 3: Cross multiply
    1,144.33x = 1,715.98 × 486.18
  4. Step 4: Simplify right side
    1,144.33x = 834,277.42
  5. Step 5: Solve for x
    x = 834,277.42/1,144.33
  6. Step 6: Final answer
    x = 729.05

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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.