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Finding the Fourth Proportional to 1,282.82, 1,923.12 and 1,089.08

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Solution

The fourth proportional to 1,282.82, 1,923.12 and 1,089.08 is: 1,632.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.82 : 1,923.12 = 1,089.08 : x
  2. Step 2: Convert to fraction form
    1,282.82/1,923.12 = 1,089.08/x
  3. Step 3: Cross multiply
    1,282.82x = 1,923.12 × 1,089.08
  4. Step 4: Simplify right side
    1,282.82x = 2,094,431.53
  5. Step 5: Solve for x
    x = 2,094,431.53/1,282.82
  6. Step 6: Final answer
    x = 1,632.68

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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.