Home / 1,339.72-2,008.46-929.66

Finding the Fourth Proportional to 1,339.72, 2,008.46 and 929.66

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Solution

The fourth proportional to 1,339.72, 2,008.46 and 929.66 is: 1,393.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.72 : 2,008.46 = 929.66 : x
  2. Step 2: Convert to fraction form
    1,339.72/2,008.46 = 929.66/x
  3. Step 3: Cross multiply
    1,339.72x = 2,008.46 × 929.66
  4. Step 4: Simplify right side
    1,339.72x = 1,867,177.21
  5. Step 5: Solve for x
    x = 1,867,177.21/1,339.72
  6. Step 6: Final answer
    x = 1,393.71

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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.