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Finding the Fourth Proportional to 157.91, 235.28 and 149.07

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Solution

The fourth proportional to 157.91, 235.28 and 149.07 is: 222.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.91 : 235.28 = 149.07 : x
  2. Step 2: Convert to fraction form
    157.91/235.28 = 149.07/x
  3. Step 3: Cross multiply
    157.91x = 235.28 × 149.07
  4. Step 4: Simplify right side
    157.91x = 35,071.56
  5. Step 5: Solve for x
    x = 35,071.56/157.91
  6. Step 6: Final answer
    x = 222.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.