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Finding the Fourth Proportional to 414.39, 571.65 and 256.98

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Solution

The fourth proportional to 414.39, 571.65 and 256.98 is: 354.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.39 : 571.65 = 256.98 : x
  2. Step 2: Convert to fraction form
    414.39/571.65 = 256.98/x
  3. Step 3: Cross multiply
    414.39x = 571.65 × 256.98
  4. Step 4: Simplify right side
    414.39x = 146,902.62
  5. Step 5: Solve for x
    x = 146,902.62/414.39
  6. Step 6: Final answer
    x = 354.50

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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.