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Finding the Fourth Proportional to 615.84, 922.80 and 355.97

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Solution

The fourth proportional to 615.84, 922.80 and 355.97 is: 533.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.84 : 922.80 = 355.97 : x
  2. Step 2: Convert to fraction form
    615.84/922.80 = 355.97/x
  3. Step 3: Cross multiply
    615.84x = 922.80 × 355.97
  4. Step 4: Simplify right side
    615.84x = 328,485.20
  5. Step 5: Solve for x
    x = 328,485.20/615.84
  6. Step 6: Final answer
    x = 533.39

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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.