Home / 1,980.28-2,972.85-1,158.94

Finding the Fourth Proportional to 1,980.28, 2,972.85 and 1,158.94

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Solution

The fourth proportional to 1,980.28, 2,972.85 and 1,158.94 is: 1,739.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.28 : 2,972.85 = 1,158.94 : x
  2. Step 2: Convert to fraction form
    1,980.28/2,972.85 = 1,158.94/x
  3. Step 3: Cross multiply
    1,980.28x = 2,972.85 × 1,158.94
  4. Step 4: Simplify right side
    1,980.28x = 3,445,354.78
  5. Step 5: Solve for x
    x = 3,445,354.78/1,980.28
  6. Step 6: Final answer
    x = 1,739.83

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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.