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Finding the Fourth Proportional to 415.51, 622.70 and 158.87

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Solution

The fourth proportional to 415.51, 622.70 and 158.87 is: 238.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.51 : 622.70 = 158.87 : x
  2. Step 2: Convert to fraction form
    415.51/622.70 = 158.87/x
  3. Step 3: Cross multiply
    415.51x = 622.70 × 158.87
  4. Step 4: Simplify right side
    415.51x = 98,928.35
  5. Step 5: Solve for x
    x = 98,928.35/415.51
  6. Step 6: Final answer
    x = 238.09

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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.