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Finding the Fourth Proportional to 445.74, 615.27 and 306.57

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Solution

The fourth proportional to 445.74, 615.27 and 306.57 is: 423.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.74 : 615.27 = 306.57 : x
  2. Step 2: Convert to fraction form
    445.74/615.27 = 306.57/x
  3. Step 3: Cross multiply
    445.74x = 615.27 × 306.57
  4. Step 4: Simplify right side
    445.74x = 188,623.32
  5. Step 5: Solve for x
    x = 188,623.32/445.74
  6. Step 6: Final answer
    x = 423.17

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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.