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Finding the Fourth Proportional to 300.15, 414.38 and 202.01

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Solution

The fourth proportional to 300.15, 414.38 and 202.01 is: 278.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.15 : 414.38 = 202.01 : x
  2. Step 2: Convert to fraction form
    300.15/414.38 = 202.01/x
  3. Step 3: Cross multiply
    300.15x = 414.38 × 202.01
  4. Step 4: Simplify right side
    300.15x = 83,707.34
  5. Step 5: Solve for x
    x = 83,707.34/300.15
  6. Step 6: Final answer
    x = 278.89

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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.