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Finding the Fourth Proportional to 1,180.28, 1,770.41 and 718.19

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Solution

The fourth proportional to 1,180.28, 1,770.41 and 718.19 is: 1,077.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.28 : 1,770.41 = 718.19 : x
  2. Step 2: Convert to fraction form
    1,180.28/1,770.41 = 718.19/x
  3. Step 3: Cross multiply
    1,180.28x = 1,770.41 × 718.19
  4. Step 4: Simplify right side
    1,180.28x = 1,271,490.34
  5. Step 5: Solve for x
    x = 1,271,490.34/1,180.28
  6. Step 6: Final answer
    x = 1,077.28

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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.