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Finding the Fourth Proportional to 613.71, 847.31 and 448.34

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Solution

The fourth proportional to 613.71, 847.31 and 448.34 is: 618.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.71 : 847.31 = 448.34 : x
  2. Step 2: Convert to fraction form
    613.71/847.31 = 448.34/x
  3. Step 3: Cross multiply
    613.71x = 847.31 × 448.34
  4. Step 4: Simplify right side
    613.71x = 379,876.49
  5. Step 5: Solve for x
    x = 379,876.49/613.71
  6. Step 6: Final answer
    x = 618.98

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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.