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Finding the Fourth Proportional to 1,119.53, 1,679.33 and 297.80

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Solution

The fourth proportional to 1,119.53, 1,679.33 and 297.80 is: 446.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.53 : 1,679.33 = 297.80 : x
  2. Step 2: Convert to fraction form
    1,119.53/1,679.33 = 297.80/x
  3. Step 3: Cross multiply
    1,119.53x = 1,679.33 × 297.80
  4. Step 4: Simplify right side
    1,119.53x = 500,104.47
  5. Step 5: Solve for x
    x = 500,104.47/1,119.53
  6. Step 6: Final answer
    x = 446.71

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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.