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Finding the Fourth Proportional to 1,423.37, 2,135.32 and 449.61

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Solution

The fourth proportional to 1,423.37, 2,135.32 and 449.61 is: 674.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.37 : 2,135.32 = 449.61 : x
  2. Step 2: Convert to fraction form
    1,423.37/2,135.32 = 449.61/x
  3. Step 3: Cross multiply
    1,423.37x = 2,135.32 × 449.61
  4. Step 4: Simplify right side
    1,423.37x = 960,060.10
  5. Step 5: Solve for x
    x = 960,060.10/1,423.37
  6. Step 6: Final answer
    x = 674.50

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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.