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Finding the Fourth Proportional to 615.63, 921.15 and 368.97

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Solution

The fourth proportional to 615.63, 921.15 and 368.97 is: 552.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.63 : 921.15 = 368.97 : x
  2. Step 2: Convert to fraction form
    615.63/921.15 = 368.97/x
  3. Step 3: Cross multiply
    615.63x = 921.15 × 368.97
  4. Step 4: Simplify right side
    615.63x = 339,876.72
  5. Step 5: Solve for x
    x = 339,876.72/615.63
  6. Step 6: Final answer
    x = 552.08

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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.