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Finding the Fourth Proportional to 618.66, 922.02 and 613.56

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Solution

The fourth proportional to 618.66, 922.02 and 613.56 is: 914.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.66 : 922.02 = 613.56 : x
  2. Step 2: Convert to fraction form
    618.66/922.02 = 613.56/x
  3. Step 3: Cross multiply
    618.66x = 922.02 × 613.56
  4. Step 4: Simplify right side
    618.66x = 565,714.59
  5. Step 5: Solve for x
    x = 565,714.59/618.66
  6. Step 6: Final answer
    x = 914.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.