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Finding the Fourth Proportional to 613.76, 846.99 and 448.25

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Solution

The fourth proportional to 613.76, 846.99 and 448.25 is: 618.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.76 : 846.99 = 448.25 : x
  2. Step 2: Convert to fraction form
    613.76/846.99 = 448.25/x
  3. Step 3: Cross multiply
    613.76x = 846.99 × 448.25
  4. Step 4: Simplify right side
    613.76x = 379,659.03
  5. Step 5: Solve for x
    x = 379,659.03/613.76
  6. Step 6: Final answer
    x = 618.58

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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.