Home / 1,228.92-1,696.30-731.72

Finding the Fourth Proportional to 1,228.92, 1,696.30 and 731.72

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Solution

The fourth proportional to 1,228.92, 1,696.30 and 731.72 is: 1,010.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.92 : 1,696.30 = 731.72 : x
  2. Step 2: Convert to fraction form
    1,228.92/1,696.30 = 731.72/x
  3. Step 3: Cross multiply
    1,228.92x = 1,696.30 × 731.72
  4. Step 4: Simplify right side
    1,228.92x = 1,241,216.64
  5. Step 5: Solve for x
    x = 1,241,216.64/1,228.92
  6. Step 6: Final answer
    x = 1,010.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.