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Finding the Fourth Proportional to 416.98, 625.34 and 143.02

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Solution

The fourth proportional to 416.98, 625.34 and 143.02 is: 214.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.98 : 625.34 = 143.02 : x
  2. Step 2: Convert to fraction form
    416.98/625.34 = 143.02/x
  3. Step 3: Cross multiply
    416.98x = 625.34 × 143.02
  4. Step 4: Simplify right side
    416.98x = 89,436.13
  5. Step 5: Solve for x
    x = 89,436.13/416.98
  6. Step 6: Final answer
    x = 214.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.