Home / 1,423.40-1,961.70-1,403.24

Finding the Fourth Proportional to 1,423.40, 1,961.70 and 1,403.24

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Solution

The fourth proportional to 1,423.40, 1,961.70 and 1,403.24 is: 1,933.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.40 : 1,961.70 = 1,403.24 : x
  2. Step 2: Convert to fraction form
    1,423.40/1,961.70 = 1,403.24/x
  3. Step 3: Cross multiply
    1,423.40x = 1,961.70 × 1,403.24
  4. Step 4: Simplify right side
    1,423.40x = 2,752,735.91
  5. Step 5: Solve for x
    x = 2,752,735.91/1,423.40
  6. Step 6: Final answer
    x = 1,933.92

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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.