Home / 1,858.40-2,786.16-1,077.20

Finding the Fourth Proportional to 1,858.40, 2,786.16 and 1,077.20

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Solution

The fourth proportional to 1,858.40, 2,786.16 and 1,077.20 is: 1,614.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,858.40 : 2,786.16 = 1,077.20 : x
  2. Step 2: Convert to fraction form
    1,858.40/2,786.16 = 1,077.20/x
  3. Step 3: Cross multiply
    1,858.40x = 2,786.16 × 1,077.20
  4. Step 4: Simplify right side
    1,858.40x = 3,001,251.55
  5. Step 5: Solve for x
    x = 3,001,251.55/1,858.40
  6. Step 6: Final answer
    x = 1,614.97

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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.