Home / 1,780.16-2,672.40-1,659.20

Finding the Fourth Proportional to 1,780.16, 2,672.40 and 1,659.20

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Solution

The fourth proportional to 1,780.16, 2,672.40 and 1,659.20 is: 2,490.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.16 : 2,672.40 = 1,659.20 : x
  2. Step 2: Convert to fraction form
    1,780.16/2,672.40 = 1,659.20/x
  3. Step 3: Cross multiply
    1,780.16x = 2,672.40 × 1,659.20
  4. Step 4: Simplify right side
    1,780.16x = 4,434,046.08
  5. Step 5: Solve for x
    x = 4,434,046.08/1,780.16
  6. Step 6: Final answer
    x = 2,490.81

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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.