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Finding the Fourth Proportional to 1,423.57, 2,135.56 and 449.44

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Solution

The fourth proportional to 1,423.57, 2,135.56 and 449.44 is: 674.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.57 : 2,135.56 = 449.44 : x
  2. Step 2: Convert to fraction form
    1,423.57/2,135.56 = 449.44/x
  3. Step 3: Cross multiply
    1,423.57x = 2,135.56 × 449.44
  4. Step 4: Simplify right side
    1,423.57x = 959,803.84
  5. Step 5: Solve for x
    x = 959,803.84/1,423.57
  6. Step 6: Final answer
    x = 674.22

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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.