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Finding the Fourth Proportional to 446.40, 615.84 and 290.88

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Solution

The fourth proportional to 446.40, 615.84 and 290.88 is: 401.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.40 : 615.84 = 290.88 : x
  2. Step 2: Convert to fraction form
    446.40/615.84 = 290.88/x
  3. Step 3: Cross multiply
    446.40x = 615.84 × 290.88
  4. Step 4: Simplify right side
    446.40x = 179,135.54
  5. Step 5: Solve for x
    x = 179,135.54/446.40
  6. Step 6: Final answer
    x = 401.29

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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.