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Finding the Fourth Proportional to 666.46, 994.83 and 618.28

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Solution

The fourth proportional to 666.46, 994.83 and 618.28 is: 922.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.46 : 994.83 = 618.28 : x
  2. Step 2: Convert to fraction form
    666.46/994.83 = 618.28/x
  3. Step 3: Cross multiply
    666.46x = 994.83 × 618.28
  4. Step 4: Simplify right side
    666.46x = 615,083.49
  5. Step 5: Solve for x
    x = 615,083.49/666.46
  6. Step 6: Final answer
    x = 922.91

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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.