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Finding the Fourth Proportional to 1,517.80, 2,276.70 and 1,347.70

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Solution

The fourth proportional to 1,517.80, 2,276.70 and 1,347.70 is: 2,021.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.80 : 2,276.70 = 1,347.70 : x
  2. Step 2: Convert to fraction form
    1,517.80/2,276.70 = 1,347.70/x
  3. Step 3: Cross multiply
    1,517.80x = 2,276.70 × 1,347.70
  4. Step 4: Simplify right side
    1,517.80x = 3,068,308.59
  5. Step 5: Solve for x
    x = 3,068,308.59/1,517.80
  6. Step 6: Final answer
    x = 2,021.55

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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.