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Finding the Fourth Proportional to 666.84, 998.82 and 630.90

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Solution

The fourth proportional to 666.84, 998.82 and 630.90 is: 944.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.84 : 998.82 = 630.90 : x
  2. Step 2: Convert to fraction form
    666.84/998.82 = 630.90/x
  3. Step 3: Cross multiply
    666.84x = 998.82 × 630.90
  4. Step 4: Simplify right side
    666.84x = 630,155.54
  5. Step 5: Solve for x
    x = 630,155.54/666.84
  6. Step 6: Final answer
    x = 944.99

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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.