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Finding the Fourth Proportional to 201.75, 278.55 and 152.70

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Solution

The fourth proportional to 201.75, 278.55 and 152.70 is: 210.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.75 : 278.55 = 152.70 : x
  2. Step 2: Convert to fraction form
    201.75/278.55 = 152.70/x
  3. Step 3: Cross multiply
    201.75x = 278.55 × 152.70
  4. Step 4: Simplify right side
    201.75x = 42,534.59
  5. Step 5: Solve for x
    x = 42,534.59/201.75
  6. Step 6: Final answer
    x = 210.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.