Home / 1,423.19-2,134.67-449.30

Finding the Fourth Proportional to 1,423.19, 2,134.67 and 449.30

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Solution

The fourth proportional to 1,423.19, 2,134.67 and 449.30 is: 673.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.19 : 2,134.67 = 449.30 : x
  2. Step 2: Convert to fraction form
    1,423.19/2,134.67 = 449.30/x
  3. Step 3: Cross multiply
    1,423.19x = 2,134.67 × 449.30
  4. Step 4: Simplify right side
    1,423.19x = 959,094.31
  5. Step 5: Solve for x
    x = 959,094.31/1,423.19
  6. Step 6: Final answer
    x = 673.91

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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.