Home / 2,658.14-3,987.60-1,358.90

Finding the Fourth Proportional to 2,658.14, 3,987.60 and 1,358.90

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Solution

The fourth proportional to 2,658.14, 3,987.60 and 1,358.90 is: 2,038.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,658.14 : 3,987.60 = 1,358.90 : x
  2. Step 2: Convert to fraction form
    2,658.14/3,987.60 = 1,358.90/x
  3. Step 3: Cross multiply
    2,658.14x = 3,987.60 × 1,358.90
  4. Step 4: Simplify right side
    2,658.14x = 5,418,749.64
  5. Step 5: Solve for x
    x = 5,418,749.64/2,658.14
  6. Step 6: Final answer
    x = 2,038.55

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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.