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Finding the Fourth Proportional to 445.86, 614.88 and 306.15

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Solution

The fourth proportional to 445.86, 614.88 and 306.15 is: 422.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.86 : 614.88 = 306.15 : x
  2. Step 2: Convert to fraction form
    445.86/614.88 = 306.15/x
  3. Step 3: Cross multiply
    445.86x = 614.88 × 306.15
  4. Step 4: Simplify right side
    445.86x = 188,245.51
  5. Step 5: Solve for x
    x = 188,245.51/445.86
  6. Step 6: Final answer
    x = 422.21

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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.