Home / 1,217.55-1,680.81-826.62

Finding the Fourth Proportional to 1,217.55, 1,680.81 and 826.62

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Solution

The fourth proportional to 1,217.55, 1,680.81 and 826.62 is: 1,141.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.55 : 1,680.81 = 826.62 : x
  2. Step 2: Convert to fraction form
    1,217.55/1,680.81 = 826.62/x
  3. Step 3: Cross multiply
    1,217.55x = 1,680.81 × 826.62
  4. Step 4: Simplify right side
    1,217.55x = 1,389,391.16
  5. Step 5: Solve for x
    x = 1,389,391.16/1,217.55
  6. Step 6: Final answer
    x = 1,141.14

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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.