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Finding the Fourth Proportional to 1,169.88, 1,753.23 and 438.72

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Solution

The fourth proportional to 1,169.88, 1,753.23 and 438.72 is: 657.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,169.88 : 1,753.23 = 438.72 : x
  2. Step 2: Convert to fraction form
    1,169.88/1,753.23 = 438.72/x
  3. Step 3: Cross multiply
    1,169.88x = 1,753.23 × 438.72
  4. Step 4: Simplify right side
    1,169.88x = 769,177.07
  5. Step 5: Solve for x
    x = 769,177.07/1,169.88
  6. Step 6: Final answer
    x = 657.48

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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.