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Finding the Fourth Proportional to 2,089.22, 3,133.50 and 790.38

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Solution

The fourth proportional to 2,089.22, 3,133.50 and 790.38 is: 1,185.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,089.22 : 3,133.50 = 790.38 : x
  2. Step 2: Convert to fraction form
    2,089.22/3,133.50 = 790.38/x
  3. Step 3: Cross multiply
    2,089.22x = 3,133.50 × 790.38
  4. Step 4: Simplify right side
    2,089.22x = 2,476,655.73
  5. Step 5: Solve for x
    x = 2,476,655.73/2,089.22
  6. Step 6: Final answer
    x = 1,185.45

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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.