Home / 1,258.28-1,887.14-392.12

Finding the Fourth Proportional to 1,258.28, 1,887.14 and 392.12

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Solution

The fourth proportional to 1,258.28, 1,887.14 and 392.12 is: 588.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258.28 : 1,887.14 = 392.12 : x
  2. Step 2: Convert to fraction form
    1,258.28/1,887.14 = 392.12/x
  3. Step 3: Cross multiply
    1,258.28x = 1,887.14 × 392.12
  4. Step 4: Simplify right side
    1,258.28x = 739,976.88
  5. Step 5: Solve for x
    x = 739,976.88/1,258.28
  6. Step 6: Final answer
    x = 588.09

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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.