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Finding the Fourth Proportional to 940.43, 1,410.55 and 698.45

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Solution

The fourth proportional to 940.43, 1,410.55 and 698.45 is: 1,047.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.43 : 1,410.55 = 698.45 : x
  2. Step 2: Convert to fraction form
    940.43/1,410.55 = 698.45/x
  3. Step 3: Cross multiply
    940.43x = 1,410.55 × 698.45
  4. Step 4: Simplify right side
    940.43x = 985,189.85
  5. Step 5: Solve for x
    x = 985,189.85/940.43
  6. Step 6: Final answer
    x = 1,047.59

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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.