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Finding the Fourth Proportional to 202.40, 303.39 and 99.62

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Solution

The fourth proportional to 202.40, 303.39 and 99.62 is: 149.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.40 : 303.39 = 99.62 : x
  2. Step 2: Convert to fraction form
    202.40/303.39 = 99.62/x
  3. Step 3: Cross multiply
    202.40x = 303.39 × 99.62
  4. Step 4: Simplify right side
    202.40x = 30,222.19
  5. Step 5: Solve for x
    x = 30,222.19/202.40
  6. Step 6: Final answer
    x = 149.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.