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Finding the Fourth Proportional to 416.08, 572.70 and 398.80

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Solution

The fourth proportional to 416.08, 572.70 and 398.80 is: 548.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.08 : 572.70 = 398.80 : x
  2. Step 2: Convert to fraction form
    416.08/572.70 = 398.80/x
  3. Step 3: Cross multiply
    416.08x = 572.70 × 398.80
  4. Step 4: Simplify right side
    416.08x = 228,392.76
  5. Step 5: Solve for x
    x = 228,392.76/416.08
  6. Step 6: Final answer
    x = 548.92

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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.