Home / 1,031.20-1,546.80-261.70

Finding the Fourth Proportional to 1,031.20, 1,546.80 and 261.70

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Solution

The fourth proportional to 1,031.20, 1,546.80 and 261.70 is: 392.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.20 : 1,546.80 = 261.70 : x
  2. Step 2: Convert to fraction form
    1,031.20/1,546.80 = 261.70/x
  3. Step 3: Cross multiply
    1,031.20x = 1,546.80 × 261.70
  4. Step 4: Simplify right side
    1,031.20x = 404,797.56
  5. Step 5: Solve for x
    x = 404,797.56/1,031.20
  6. Step 6: Final answer
    x = 392.55

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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.