Home / 1,274.46-1,911.60-724.92

Finding the Fourth Proportional to 1,274.46, 1,911.60 and 724.92

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Solution

The fourth proportional to 1,274.46, 1,911.60 and 724.92 is: 1,087.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.46 : 1,911.60 = 724.92 : x
  2. Step 2: Convert to fraction form
    1,274.46/1,911.60 = 724.92/x
  3. Step 3: Cross multiply
    1,274.46x = 1,911.60 × 724.92
  4. Step 4: Simplify right side
    1,274.46x = 1,385,757.07
  5. Step 5: Solve for x
    x = 1,385,757.07/1,274.46
  6. Step 6: Final answer
    x = 1,087.33

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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.