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Finding the Fourth Proportional to 306.64, 425.15 and 300.70

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Solution

The fourth proportional to 306.64, 425.15 and 300.70 is: 416.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.64 : 425.15 = 300.70 : x
  2. Step 2: Convert to fraction form
    306.64/425.15 = 300.70/x
  3. Step 3: Cross multiply
    306.64x = 425.15 × 300.70
  4. Step 4: Simplify right side
    306.64x = 127,842.61
  5. Step 5: Solve for x
    x = 127,842.61/306.64
  6. Step 6: Final answer
    x = 416.91

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.