Home / 1,223.66-1,687.38-943.94

Finding the Fourth Proportional to 1,223.66, 1,687.38 and 943.94

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Solution

The fourth proportional to 1,223.66, 1,687.38 and 943.94 is: 1,301.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223.66 : 1,687.38 = 943.94 : x
  2. Step 2: Convert to fraction form
    1,223.66/1,687.38 = 943.94/x
  3. Step 3: Cross multiply
    1,223.66x = 1,687.38 × 943.94
  4. Step 4: Simplify right side
    1,223.66x = 1,592,785.48
  5. Step 5: Solve for x
    x = 1,592,785.48/1,223.66
  6. Step 6: Final answer
    x = 1,301.66

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1.5x scale

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.