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Finding the Fourth Proportional to 445.88, 615.50 and 291.08

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Solution

The fourth proportional to 445.88, 615.50 and 291.08 is: 401.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.88 : 615.50 = 291.08 : x
  2. Step 2: Convert to fraction form
    445.88/615.50 = 291.08/x
  3. Step 3: Cross multiply
    445.88x = 615.50 × 291.08
  4. Step 4: Simplify right side
    445.88x = 179,155.21
  5. Step 5: Solve for x
    x = 179,155.21/445.88
  6. Step 6: Final answer
    x = 401.81

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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.