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Finding the Fourth Proportional to 615.45, 923.57 and 355.97

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Solution

The fourth proportional to 615.45, 923.57 and 355.97 is: 534.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.45 : 923.57 = 355.97 : x
  2. Step 2: Convert to fraction form
    615.45/923.57 = 355.97/x
  3. Step 3: Cross multiply
    615.45x = 923.57 × 355.97
  4. Step 4: Simplify right side
    615.45x = 328,756.82
  5. Step 5: Solve for x
    x = 328,756.82/615.45
  6. Step 6: Final answer
    x = 534.17

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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.