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Finding the Fourth Proportional to 878.14, 1,212.32 and 598.79

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Solution

The fourth proportional to 878.14, 1,212.32 and 598.79 is: 826.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    878.14 : 1,212.32 = 598.79 : x
  2. Step 2: Convert to fraction form
    878.14/1,212.32 = 598.79/x
  3. Step 3: Cross multiply
    878.14x = 1,212.32 × 598.79
  4. Step 4: Simplify right side
    878.14x = 725,922.80
  5. Step 5: Solve for x
    x = 725,922.80/878.14
  6. Step 6: Final answer
    x = 826.66

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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.