Home / 1,423.12-2,131.84-1,131.12

Finding the Fourth Proportional to 1,423.12, 2,131.84 and 1,131.12

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Solution

The fourth proportional to 1,423.12, 2,131.84 and 1,131.12 is: 1,694.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.12 : 2,131.84 = 1,131.12 : x
  2. Step 2: Convert to fraction form
    1,423.12/2,131.84 = 1,131.12/x
  3. Step 3: Cross multiply
    1,423.12x = 2,131.84 × 1,131.12
  4. Step 4: Simplify right side
    1,423.12x = 2,411,366.86
  5. Step 5: Solve for x
    x = 2,411,366.86/1,423.12
  6. Step 6: Final answer
    x = 1,694.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.