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Finding the Fourth Proportional to 446.67, 615.78 and 385.15

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Solution

The fourth proportional to 446.67, 615.78 and 385.15 is: 530.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.67 : 615.78 = 385.15 : x
  2. Step 2: Convert to fraction form
    446.67/615.78 = 385.15/x
  3. Step 3: Cross multiply
    446.67x = 615.78 × 385.15
  4. Step 4: Simplify right side
    446.67x = 237,167.67
  5. Step 5: Solve for x
    x = 237,167.67/446.67
  6. Step 6: Final answer
    x = 530.97

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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.