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Finding the Fourth Proportional to 426.99, 639.95 and 241.88

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Solution

The fourth proportional to 426.99, 639.95 and 241.88 is: 362.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.99 : 639.95 = 241.88 : x
  2. Step 2: Convert to fraction form
    426.99/639.95 = 241.88/x
  3. Step 3: Cross multiply
    426.99x = 639.95 × 241.88
  4. Step 4: Simplify right side
    426.99x = 154,793.31
  5. Step 5: Solve for x
    x = 154,793.31/426.99
  6. Step 6: Final answer
    x = 362.52

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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.