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Finding the Fourth Proportional to 1,432.68, 1,977.49 and 843.41

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Solution

The fourth proportional to 1,432.68, 1,977.49 and 843.41 is: 1,164.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.68 : 1,977.49 = 843.41 : x
  2. Step 2: Convert to fraction form
    1,432.68/1,977.49 = 843.41/x
  3. Step 3: Cross multiply
    1,432.68x = 1,977.49 × 843.41
  4. Step 4: Simplify right side
    1,432.68x = 1,667,834.84
  5. Step 5: Solve for x
    x = 1,667,834.84/1,432.68
  6. Step 6: Final answer
    x = 1,164.14

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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.