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Finding the Fourth Proportional to 1,275.14, 1,758.05 and 826.22

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Solution

The fourth proportional to 1,275.14, 1,758.05 and 826.22 is: 1,139.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.14 : 1,758.05 = 826.22 : x
  2. Step 2: Convert to fraction form
    1,275.14/1,758.05 = 826.22/x
  3. Step 3: Cross multiply
    1,275.14x = 1,758.05 × 826.22
  4. Step 4: Simplify right side
    1,275.14x = 1,452,523.15
  5. Step 5: Solve for x
    x = 1,452,523.15/1,275.14
  6. Step 6: Final answer
    x = 1,139.11

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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.