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Finding the Fourth Proportional to 1,432.09, 1,975.82 and 872.79

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Solution

The fourth proportional to 1,432.09, 1,975.82 and 872.79 is: 1,204.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.09 : 1,975.82 = 872.79 : x
  2. Step 2: Convert to fraction form
    1,432.09/1,975.82 = 872.79/x
  3. Step 3: Cross multiply
    1,432.09x = 1,975.82 × 872.79
  4. Step 4: Simplify right side
    1,432.09x = 1,724,475.94
  5. Step 5: Solve for x
    x = 1,724,475.94/1,432.09
  6. Step 6: Final answer
    x = 1,204.17

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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.