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Finding the Fourth Proportional to 613.91, 846.74 and 448.79

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Solution

The fourth proportional to 613.91, 846.74 and 448.79 is: 618.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.91 : 846.74 = 448.79 : x
  2. Step 2: Convert to fraction form
    613.91/846.74 = 448.79/x
  3. Step 3: Cross multiply
    613.91x = 846.74 × 448.79
  4. Step 4: Simplify right side
    613.91x = 380,006.20
  5. Step 5: Solve for x
    x = 380,006.20/613.91
  6. Step 6: Final answer
    x = 618.99

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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.