Home / 2,159.20-3,239.40-927.20

Finding the Fourth Proportional to 2,159.20, 3,239.40 and 927.20

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Solution

The fourth proportional to 2,159.20, 3,239.40 and 927.20 is: 1,391.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.20 : 3,239.40 = 927.20 : x
  2. Step 2: Convert to fraction form
    2,159.20/3,239.40 = 927.20/x
  3. Step 3: Cross multiply
    2,159.20x = 3,239.40 × 927.20
  4. Step 4: Simplify right side
    2,159.20x = 3,003,571.68
  5. Step 5: Solve for x
    x = 3,003,571.68/2,159.20
  6. Step 6: Final answer
    x = 1,391.06

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1.5x scale

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.