Home / 1,429.12-2,142.90-1,334.20

Finding the Fourth Proportional to 1,429.12, 2,142.90 and 1,334.20

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Solution

The fourth proportional to 1,429.12, 2,142.90 and 1,334.20 is: 2,000.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.12 : 2,142.90 = 1,334.20 : x
  2. Step 2: Convert to fraction form
    1,429.12/2,142.90 = 1,334.20/x
  3. Step 3: Cross multiply
    1,429.12x = 2,142.90 × 1,334.20
  4. Step 4: Simplify right side
    1,429.12x = 2,859,057.18
  5. Step 5: Solve for x
    x = 2,859,057.18/1,429.12
  6. Step 6: Final answer
    x = 2,000.57

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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.