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Finding the Fourth Proportional to 1,432.65, 1,976.21 and 843.06

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Solution

The fourth proportional to 1,432.65, 1,976.21 and 843.06 is: 1,162.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.65 : 1,976.21 = 843.06 : x
  2. Step 2: Convert to fraction form
    1,432.65/1,976.21 = 843.06/x
  3. Step 3: Cross multiply
    1,432.65x = 1,976.21 × 843.06
  4. Step 4: Simplify right side
    1,432.65x = 1,666,059.39
  5. Step 5: Solve for x
    x = 1,666,059.39/1,432.65
  6. Step 6: Final answer
    x = 1,162.92

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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.