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Finding the Fourth Proportional to 306.64, 457.79 and 268.48

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Solution

The fourth proportional to 306.64, 457.79 and 268.48 is: 400.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.64 : 457.79 = 268.48 : x
  2. Step 2: Convert to fraction form
    306.64/457.79 = 268.48/x
  3. Step 3: Cross multiply
    306.64x = 457.79 × 268.48
  4. Step 4: Simplify right side
    306.64x = 122,907.46
  5. Step 5: Solve for x
    x = 122,907.46/306.64
  6. Step 6: Final answer
    x = 400.82

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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.