Home / 912.20-1,258.26-519.14

Finding the Fourth Proportional to 912.20, 1,258.26 and 519.14

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Solution

The fourth proportional to 912.20, 1,258.26 and 519.14 is: 716.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.20 : 1,258.26 = 519.14 : x
  2. Step 2: Convert to fraction form
    912.20/1,258.26 = 519.14/x
  3. Step 3: Cross multiply
    912.20x = 1,258.26 × 519.14
  4. Step 4: Simplify right side
    912.20x = 653,213.10
  5. Step 5: Solve for x
    x = 653,213.10/912.20
  6. Step 6: Final answer
    x = 716.09

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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.