Home / 2,078.48-3,119.88-1,531.28

Finding the Fourth Proportional to 2,078.48, 3,119.88 and 1,531.28

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Solution

The fourth proportional to 2,078.48, 3,119.88 and 1,531.28 is: 2,298.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,078.48 : 3,119.88 = 1,531.28 : x
  2. Step 2: Convert to fraction form
    2,078.48/3,119.88 = 1,531.28/x
  3. Step 3: Cross multiply
    2,078.48x = 3,119.88 × 1,531.28
  4. Step 4: Simplify right side
    2,078.48x = 4,777,409.85
  5. Step 5: Solve for x
    x = 4,777,409.85/2,078.48
  6. Step 6: Final answer
    x = 2,298.51

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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.