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Finding the Fourth Proportional to 446.33, 615.67 and 304.78

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Solution

The fourth proportional to 446.33, 615.67 and 304.78 is: 420.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.33 : 615.67 = 304.78 : x
  2. Step 2: Convert to fraction form
    446.33/615.67 = 304.78/x
  3. Step 3: Cross multiply
    446.33x = 615.67 × 304.78
  4. Step 4: Simplify right side
    446.33x = 187,642.76
  5. Step 5: Solve for x
    x = 187,642.76/446.33
  6. Step 6: Final answer
    x = 420.42

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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.