Home / 1,218.85-1,682.57-1,158.71

Finding the Fourth Proportional to 1,218.85, 1,682.57 and 1,158.71

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Solution

The fourth proportional to 1,218.85, 1,682.57 and 1,158.71 is: 1,599.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.85 : 1,682.57 = 1,158.71 : x
  2. Step 2: Convert to fraction form
    1,218.85/1,682.57 = 1,158.71/x
  3. Step 3: Cross multiply
    1,218.85x = 1,682.57 × 1,158.71
  4. Step 4: Simplify right side
    1,218.85x = 1,949,605.17
  5. Step 5: Solve for x
    x = 1,949,605.17/1,218.85
  6. Step 6: Final answer
    x = 1,599.55

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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.