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Finding the Fourth Proportional to 314.20, 436.09 and 306.28

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Solution

The fourth proportional to 314.20, 436.09 and 306.28 is: 425.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.20 : 436.09 = 306.28 : x
  2. Step 2: Convert to fraction form
    314.20/436.09 = 306.28/x
  3. Step 3: Cross multiply
    314.20x = 436.09 × 306.28
  4. Step 4: Simplify right side
    314.20x = 133,565.65
  5. Step 5: Solve for x
    x = 133,565.65/314.20
  6. Step 6: Final answer
    x = 425.10

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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.