Home / 1,815.20-2,505.04-1,151.90

Finding the Fourth Proportional to 1,815.20, 2,505.04 and 1,151.90

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Solution

The fourth proportional to 1,815.20, 2,505.04 and 1,151.90 is: 1,589.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.20 : 2,505.04 = 1,151.90 : x
  2. Step 2: Convert to fraction form
    1,815.20/2,505.04 = 1,151.90/x
  3. Step 3: Cross multiply
    1,815.20x = 2,505.04 × 1,151.90
  4. Step 4: Simplify right side
    1,815.20x = 2,885,555.58
  5. Step 5: Solve for x
    x = 2,885,555.58/1,815.20
  6. Step 6: Final answer
    x = 1,589.66

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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.