Home / 2,687.12-4,031.16-955.28

Finding the Fourth Proportional to 2,687.12, 4,031.16 and 955.28

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Solution

The fourth proportional to 2,687.12, 4,031.16 and 955.28 is: 1,433.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.12 : 4,031.16 = 955.28 : x
  2. Step 2: Convert to fraction form
    2,687.12/4,031.16 = 955.28/x
  3. Step 3: Cross multiply
    2,687.12x = 4,031.16 × 955.28
  4. Step 4: Simplify right side
    2,687.12x = 3,850,886.52
  5. Step 5: Solve for x
    x = 3,850,886.52/2,687.12
  6. Step 6: Final answer
    x = 1,433.09

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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.