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Finding the Fourth Proportional to 202.20, 278.70 and 152.94

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Solution

The fourth proportional to 202.20, 278.70 and 152.94 is: 210.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.20 : 278.70 = 152.94 : x
  2. Step 2: Convert to fraction form
    202.20/278.70 = 152.94/x
  3. Step 3: Cross multiply
    202.20x = 278.70 × 152.94
  4. Step 4: Simplify right side
    202.20x = 42,624.38
  5. Step 5: Solve for x
    x = 42,624.38/202.20
  6. Step 6: Final answer
    x = 210.80

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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.