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Finding the Fourth Proportional to 202.32, 278.82 and 153.09

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Solution

The fourth proportional to 202.32, 278.82 and 153.09 is: 210.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.32 : 278.82 = 153.09 : x
  2. Step 2: Convert to fraction form
    202.32/278.82 = 153.09/x
  3. Step 3: Cross multiply
    202.32x = 278.82 × 153.09
  4. Step 4: Simplify right side
    202.32x = 42,684.55
  5. Step 5: Solve for x
    x = 42,684.55/202.32
  6. Step 6: Final answer
    x = 210.98

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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.