Home / 1,971.80-2,720.72-1,132.55

Finding the Fourth Proportional to 1,971.80, 2,720.72 and 1,132.55

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Solution

The fourth proportional to 1,971.80, 2,720.72 and 1,132.55 is: 1,562.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.80 : 2,720.72 = 1,132.55 : x
  2. Step 2: Convert to fraction form
    1,971.80/2,720.72 = 1,132.55/x
  3. Step 3: Cross multiply
    1,971.80x = 2,720.72 × 1,132.55
  4. Step 4: Simplify right side
    1,971.80x = 3,081,332.17
  5. Step 5: Solve for x
    x = 3,081,332.17/1,971.80
  6. Step 6: Final answer
    x = 1,562.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.