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Finding the Fourth Proportional to 417.73, 626.81 and 157.90

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Solution

The fourth proportional to 417.73, 626.81 and 157.90 is: 236.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.73 : 626.81 = 157.90 : x
  2. Step 2: Convert to fraction form
    417.73/626.81 = 157.90/x
  3. Step 3: Cross multiply
    417.73x = 626.81 × 157.90
  4. Step 4: Simplify right side
    417.73x = 98,973.30
  5. Step 5: Solve for x
    x = 98,973.30/417.73
  6. Step 6: Final answer
    x = 236.93

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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.