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Finding the Fourth Proportional to 699.99, 1,050.05 and 664.95

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Solution

The fourth proportional to 699.99, 1,050.05 and 664.95 is: 997.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.99 : 1,050.05 = 664.95 : x
  2. Step 2: Convert to fraction form
    699.99/1,050.05 = 664.95/x
  3. Step 3: Cross multiply
    699.99x = 1,050.05 × 664.95
  4. Step 4: Simplify right side
    699.99x = 698,227.42
  5. Step 5: Solve for x
    x = 698,227.42/699.99
  6. Step 6: Final answer
    x = 997.48

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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.