Home / 1,140.96-1,564.25-1,120.20

Finding the Fourth Proportional to 1,140.96, 1,564.25 and 1,120.20

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Solution

The fourth proportional to 1,140.96, 1,564.25 and 1,120.20 is: 1,535.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.96 : 1,564.25 = 1,120.20 : x
  2. Step 2: Convert to fraction form
    1,140.96/1,564.25 = 1,120.20/x
  3. Step 3: Cross multiply
    1,140.96x = 1,564.25 × 1,120.20
  4. Step 4: Simplify right side
    1,140.96x = 1,752,272.85
  5. Step 5: Solve for x
    x = 1,752,272.85/1,140.96
  6. Step 6: Final answer
    x = 1,535.79

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.