Home / 1,971.78-2,720.76-1,132.53

Finding the Fourth Proportional to 1,971.78, 2,720.76 and 1,132.53

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Solution

The fourth proportional to 1,971.78, 2,720.76 and 1,132.53 is: 1,562.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.78 : 2,720.76 = 1,132.53 : x
  2. Step 2: Convert to fraction form
    1,971.78/2,720.76 = 1,132.53/x
  3. Step 3: Cross multiply
    1,971.78x = 2,720.76 × 1,132.53
  4. Step 4: Simplify right side
    1,971.78x = 3,081,342.32
  5. Step 5: Solve for x
    x = 3,081,342.32/1,971.78
  6. Step 6: Final answer
    x = 1,562.72

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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.