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Finding the Fourth Proportional to 1,377.62, 2,066.40 and 452.80

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Solution

The fourth proportional to 1,377.62, 2,066.40 and 452.80 is: 679.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.62 : 2,066.40 = 452.80 : x
  2. Step 2: Convert to fraction form
    1,377.62/2,066.40 = 452.80/x
  3. Step 3: Cross multiply
    1,377.62x = 2,066.40 × 452.80
  4. Step 4: Simplify right side
    1,377.62x = 935,668.50
  5. Step 5: Solve for x
    x = 935,668.50/1,377.62
  6. Step 6: Final answer
    x = 679.19

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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.