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Finding the Fourth Proportional to 1,453.80, 2,180.72 and 517.49

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Solution

The fourth proportional to 1,453.80, 2,180.72 and 517.49 is: 776.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,453.80 : 2,180.72 = 517.49 : x
  2. Step 2: Convert to fraction form
    1,453.80/2,180.72 = 517.49/x
  3. Step 3: Cross multiply
    1,453.80x = 2,180.72 × 517.49
  4. Step 4: Simplify right side
    1,453.80x = 1,128,500.79
  5. Step 5: Solve for x
    x = 1,128,500.79/1,453.80
  6. Step 6: Final answer
    x = 776.24

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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.