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Finding the Fourth Proportional to 157.54, 218.33 and 155.34

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Solution

The fourth proportional to 157.54, 218.33 and 155.34 is: 215.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.54 : 218.33 = 155.34 : x
  2. Step 2: Convert to fraction form
    157.54/218.33 = 155.34/x
  3. Step 3: Cross multiply
    157.54x = 218.33 × 155.34
  4. Step 4: Simplify right side
    157.54x = 33,915.19
  5. Step 5: Solve for x
    x = 33,915.19/157.54
  6. Step 6: Final answer
    x = 215.28

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.