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Finding the Fourth Proportional to 615.05, 921.78 and 337.22

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Solution

The fourth proportional to 615.05, 921.78 and 337.22 is: 505.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.05 : 921.78 = 337.22 : x
  2. Step 2: Convert to fraction form
    615.05/921.78 = 337.22/x
  3. Step 3: Cross multiply
    615.05x = 921.78 × 337.22
  4. Step 4: Simplify right side
    615.05x = 310,838.04
  5. Step 5: Solve for x
    x = 310,838.04/615.05
  6. Step 6: Final answer
    x = 505.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.