Home / 2,814.90-4,221.28-1,125.78

Finding the Fourth Proportional to 2,814.90, 4,221.28 and 1,125.78

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Solution

The fourth proportional to 2,814.90, 4,221.28 and 1,125.78 is: 1,688.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,814.90 : 4,221.28 = 1,125.78 : x
  2. Step 2: Convert to fraction form
    2,814.90/4,221.28 = 1,125.78/x
  3. Step 3: Cross multiply
    2,814.90x = 4,221.28 × 1,125.78
  4. Step 4: Simplify right side
    2,814.90x = 4,752,232.60
  5. Step 5: Solve for x
    x = 4,752,232.60/2,814.90
  6. Step 6: Final answer
    x = 1,688.24

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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.