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Finding the Fourth Proportional to 202.40, 280.59 and 191.45

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Solution

The fourth proportional to 202.40, 280.59 and 191.45 is: 265.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.40 : 280.59 = 191.45 : x
  2. Step 2: Convert to fraction form
    202.40/280.59 = 191.45/x
  3. Step 3: Cross multiply
    202.40x = 280.59 × 191.45
  4. Step 4: Simplify right side
    202.40x = 53,718.96
  5. Step 5: Solve for x
    x = 53,718.96/202.40
  6. Step 6: Final answer
    x = 265.41

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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.