Home / 1,251.04-1,715.20-1,231.92

Finding the Fourth Proportional to 1,251.04, 1,715.20 and 1,231.92

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Solution

The fourth proportional to 1,251.04, 1,715.20 and 1,231.92 is: 1,688.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.04 : 1,715.20 = 1,231.92 : x
  2. Step 2: Convert to fraction form
    1,251.04/1,715.20 = 1,231.92/x
  3. Step 3: Cross multiply
    1,251.04x = 1,715.20 × 1,231.92
  4. Step 4: Simplify right side
    1,251.04x = 2,112,989.18
  5. Step 5: Solve for x
    x = 2,112,989.18/1,251.04
  6. Step 6: Final answer
    x = 1,688.99

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.