Home / 1,223.40-1,687.71-1,176.27

Finding the Fourth Proportional to 1,223.40, 1,687.71 and 1,176.27

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Solution

The fourth proportional to 1,223.40, 1,687.71 and 1,176.27 is: 1,622.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223.40 : 1,687.71 = 1,176.27 : x
  2. Step 2: Convert to fraction form
    1,223.40/1,687.71 = 1,176.27/x
  3. Step 3: Cross multiply
    1,223.40x = 1,687.71 × 1,176.27
  4. Step 4: Simplify right side
    1,223.40x = 1,985,202.64
  5. Step 5: Solve for x
    x = 1,985,202.64/1,223.40
  6. Step 6: Final answer
    x = 1,622.69

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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.