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Finding the Fourth Proportional to 157, 215.22 and 154.26

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Solution

The fourth proportional to 157, 215.22 and 154.26 is: 211.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    157 : 215.22 = 154.26 : x
  2. Step 2: Convert to fraction form
    157/215.22 = 154.26/x
  3. Step 3: Cross multiply
    157x = 215.22 × 154.26
  4. Step 4: Simplify right side
    157x = 33,199.84
  5. Step 5: Solve for x
    x = 33,199.84/157
  6. Step 6: Final answer
    x = 211.46

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.