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Finding the Fourth Proportional to 616.49, 923.45 and 385.49

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Solution

The fourth proportional to 616.49, 923.45 and 385.49 is: 577.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.49 : 923.45 = 385.49 : x
  2. Step 2: Convert to fraction form
    616.49/923.45 = 385.49/x
  3. Step 3: Cross multiply
    616.49x = 923.45 × 385.49
  4. Step 4: Simplify right side
    616.49x = 355,978.81
  5. Step 5: Solve for x
    x = 355,978.81/616.49
  6. Step 6: Final answer
    x = 577.43

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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.