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Finding the Fourth Proportional to 266.10, 398.64 and 157.56

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Solution

The fourth proportional to 266.10, 398.64 and 157.56 is: 236.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.10 : 398.64 = 157.56 : x
  2. Step 2: Convert to fraction form
    266.10/398.64 = 157.56/x
  3. Step 3: Cross multiply
    266.10x = 398.64 × 157.56
  4. Step 4: Simplify right side
    266.10x = 62,809.72
  5. Step 5: Solve for x
    x = 62,809.72/266.10
  6. Step 6: Final answer
    x = 236.04

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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.