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Finding the Fourth Proportional to 1,089.96, 1,504.07 and 611.38

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Solution

The fourth proportional to 1,089.96, 1,504.07 and 611.38 is: 843.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.96 : 1,504.07 = 611.38 : x
  2. Step 2: Convert to fraction form
    1,089.96/1,504.07 = 611.38/x
  3. Step 3: Cross multiply
    1,089.96x = 1,504.07 × 611.38
  4. Step 4: Simplify right side
    1,089.96x = 919,565.38
  5. Step 5: Solve for x
    x = 919,565.38/1,089.96
  6. Step 6: Final answer
    x = 843.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.