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Finding the Fourth Proportional to 615.47, 922.35 and 355.30

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Solution

The fourth proportional to 615.47, 922.35 and 355.30 is: 532.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.47 : 922.35 = 355.30 : x
  2. Step 2: Convert to fraction form
    615.47/922.35 = 355.30/x
  3. Step 3: Cross multiply
    615.47x = 922.35 × 355.30
  4. Step 4: Simplify right side
    615.47x = 327,709.98
  5. Step 5: Solve for x
    x = 327,709.98/615.47
  6. Step 6: Final answer
    x = 532.46

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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.