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Finding the Fourth Proportional to 301.18, 452.80 and 278.64

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Solution

The fourth proportional to 301.18, 452.80 and 278.64 is: 418.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.18 : 452.80 = 278.64 : x
  2. Step 2: Convert to fraction form
    301.18/452.80 = 278.64/x
  3. Step 3: Cross multiply
    301.18x = 452.80 × 278.64
  4. Step 4: Simplify right side
    301.18x = 126,165.93
  5. Step 5: Solve for x
    x = 126,165.93/301.18
  6. Step 6: Final answer
    x = 418.91

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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.