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Finding the Fourth Proportional to 417.98, 626.84 and 157.79

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Solution

The fourth proportional to 417.98, 626.84 and 157.79 is: 236.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.98 : 626.84 = 157.79 : x
  2. Step 2: Convert to fraction form
    417.98/626.84 = 157.79/x
  3. Step 3: Cross multiply
    417.98x = 626.84 × 157.79
  4. Step 4: Simplify right side
    417.98x = 98,905.16
  5. Step 5: Solve for x
    x = 98,905.16/417.98
  6. Step 6: Final answer
    x = 236.63

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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.