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Finding the Fourth Proportional to 446.88, 615.22 and 388.63

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Solution

The fourth proportional to 446.88, 615.22 and 388.63 is: 535.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.88 : 615.22 = 388.63 : x
  2. Step 2: Convert to fraction form
    446.88/615.22 = 388.63/x
  3. Step 3: Cross multiply
    446.88x = 615.22 × 388.63
  4. Step 4: Simplify right side
    446.88x = 239,092.95
  5. Step 5: Solve for x
    x = 239,092.95/446.88
  6. Step 6: Final answer
    x = 535.03

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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.