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Finding the Fourth Proportional to 1,432.90, 1,977.66 and 843.40

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Solution

The fourth proportional to 1,432.90, 1,977.66 and 843.40 is: 1,164.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.90 : 1,977.66 = 843.40 : x
  2. Step 2: Convert to fraction form
    1,432.90/1,977.66 = 843.40/x
  3. Step 3: Cross multiply
    1,432.90x = 1,977.66 × 843.40
  4. Step 4: Simplify right side
    1,432.90x = 1,667,958.44
  5. Step 5: Solve for x
    x = 1,667,958.44/1,432.90
  6. Step 6: Final answer
    x = 1,164.04

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1.5x scale

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.