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Finding the Fourth Proportional to 446.12, 615.76 and 280.38

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Solution

The fourth proportional to 446.12, 615.76 and 280.38 is: 387.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.12 : 615.76 = 280.38 : x
  2. Step 2: Convert to fraction form
    446.12/615.76 = 280.38/x
  3. Step 3: Cross multiply
    446.12x = 615.76 × 280.38
  4. Step 4: Simplify right side
    446.12x = 172,646.09
  5. Step 5: Solve for x
    x = 172,646.09/446.12
  6. Step 6: Final answer
    x = 387.00

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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.