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Finding the Fourth Proportional to 611.28, 914.92 and 448.92

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Solution

The fourth proportional to 611.28, 914.92 and 448.92 is: 671.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.28 : 914.92 = 448.92 : x
  2. Step 2: Convert to fraction form
    611.28/914.92 = 448.92/x
  3. Step 3: Cross multiply
    611.28x = 914.92 × 448.92
  4. Step 4: Simplify right side
    611.28x = 410,725.89
  5. Step 5: Solve for x
    x = 410,725.89/611.28
  6. Step 6: Final answer
    x = 671.91

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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.