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Finding the Fourth Proportional to 319.92, 477.42 and 268.08

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Solution

The fourth proportional to 319.92, 477.42 and 268.08 is: 400.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.92 : 477.42 = 268.08 : x
  2. Step 2: Convert to fraction form
    319.92/477.42 = 268.08/x
  3. Step 3: Cross multiply
    319.92x = 477.42 × 268.08
  4. Step 4: Simplify right side
    319.92x = 127,986.75
  5. Step 5: Solve for x
    x = 127,986.75/319.92
  6. Step 6: Final answer
    x = 400.06

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.