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Finding the Fourth Proportional to 446.47, 615.73 and 280.70

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Solution

The fourth proportional to 446.47, 615.73 and 280.70 is: 387.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.47 : 615.73 = 280.70 : x
  2. Step 2: Convert to fraction form
    446.47/615.73 = 280.70/x
  3. Step 3: Cross multiply
    446.47x = 615.73 × 280.70
  4. Step 4: Simplify right side
    446.47x = 172,835.41
  5. Step 5: Solve for x
    x = 172,835.41/446.47
  6. Step 6: Final answer
    x = 387.12

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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.