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Finding the Fourth Proportional to 446.21, 615.80 and 247.05

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Solution

The fourth proportional to 446.21, 615.80 and 247.05 is: 340.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.21 : 615.80 = 247.05 : x
  2. Step 2: Convert to fraction form
    446.21/615.80 = 247.05/x
  3. Step 3: Cross multiply
    446.21x = 615.80 × 247.05
  4. Step 4: Simplify right side
    446.21x = 152,133.39
  5. Step 5: Solve for x
    x = 152,133.39/446.21
  6. Step 6: Final answer
    x = 340.95

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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.