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Finding the Fourth Proportional to 252.21, 347.85 and 158.79

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Solution

The fourth proportional to 252.21, 347.85 and 158.79 is: 219.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.21 : 347.85 = 158.79 : x
  2. Step 2: Convert to fraction form
    252.21/347.85 = 158.79/x
  3. Step 3: Cross multiply
    252.21x = 347.85 × 158.79
  4. Step 4: Simplify right side
    252.21x = 55,235.10
  5. Step 5: Solve for x
    x = 55,235.10/252.21
  6. Step 6: Final answer
    x = 219.00

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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.