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Finding the Fourth Proportional to 301.65, 416.48 and 280.98

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Solution

The fourth proportional to 301.65, 416.48 and 280.98 is: 387.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.65 : 416.48 = 280.98 : x
  2. Step 2: Convert to fraction form
    301.65/416.48 = 280.98/x
  3. Step 3: Cross multiply
    301.65x = 416.48 × 280.98
  4. Step 4: Simplify right side
    301.65x = 117,019.06
  5. Step 5: Solve for x
    x = 117,019.06/301.65
  6. Step 6: Final answer
    x = 387.94

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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.