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Finding the Fourth Proportional to 1,436.84, 2,155.34 and 449.83

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Solution

The fourth proportional to 1,436.84, 2,155.34 and 449.83 is: 674.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,436.84 : 2,155.34 = 449.83 : x
  2. Step 2: Convert to fraction form
    1,436.84/2,155.34 = 449.83/x
  3. Step 3: Cross multiply
    1,436.84x = 2,155.34 × 449.83
  4. Step 4: Simplify right side
    1,436.84x = 969,534.34
  5. Step 5: Solve for x
    x = 969,534.34/1,436.84
  6. Step 6: Final answer
    x = 674.77

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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.