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Finding the Fourth Proportional to 663,425.56, 914,803.76 and 448,191.91

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Solution

The fourth proportional to 663,425.56, 914,803.76 and 448,191.91 is: 618,016.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,425.56 : 914,803.76 = 448,191.91 : x
  2. Step 2: Convert to fraction form
    663,425.56/914,803.76 = 448,191.91/x
  3. Step 3: Cross multiply
    663,425.56x = 914,803.76 × 448,191.91
  4. Step 4: Simplify right side
    663,425.56x = 410,007,644,469.58
  5. Step 5: Solve for x
    x = 410,007,644,469.58/663,425.56
  6. Step 6: Final answer
    x = 618,016.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.