Home / 1,980.85-2,732.90-1,141.53

Finding the Fourth Proportional to 1,980.85, 2,732.90 and 1,141.53

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Solution

The fourth proportional to 1,980.85, 2,732.90 and 1,141.53 is: 1,574.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.85 : 2,732.90 = 1,141.53 : x
  2. Step 2: Convert to fraction form
    1,980.85/2,732.90 = 1,141.53/x
  3. Step 3: Cross multiply
    1,980.85x = 2,732.90 × 1,141.53
  4. Step 4: Simplify right side
    1,980.85x = 3,119,677.80
  5. Step 5: Solve for x
    x = 3,119,677.80/1,980.85
  6. Step 6: Final answer
    x = 1,574.92

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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.