Home / 1,240.97-1,713.38-947.75

Finding the Fourth Proportional to 1,240.97, 1,713.38 and 947.75

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Solution

The fourth proportional to 1,240.97, 1,713.38 and 947.75 is: 1,308.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.97 : 1,713.38 = 947.75 : x
  2. Step 2: Convert to fraction form
    1,240.97/1,713.38 = 947.75/x
  3. Step 3: Cross multiply
    1,240.97x = 1,713.38 × 947.75
  4. Step 4: Simplify right side
    1,240.97x = 1,623,842.59
  5. Step 5: Solve for x
    x = 1,623,842.59/1,240.97
  6. Step 6: Final answer
    x = 1,308.53

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1.5x scale

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.