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Finding the Fourth Proportional to 445.98, 615.22 and 288.57

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Solution

The fourth proportional to 445.98, 615.22 and 288.57 is: 398.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.98 : 615.22 = 288.57 : x
  2. Step 2: Convert to fraction form
    445.98/615.22 = 288.57/x
  3. Step 3: Cross multiply
    445.98x = 615.22 × 288.57
  4. Step 4: Simplify right side
    445.98x = 177,534.04
  5. Step 5: Solve for x
    x = 177,534.04/445.98
  6. Step 6: Final answer
    x = 398.08

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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.