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Finding the Fourth Proportional to 878.44, 1,315.78 and 569.37

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Solution

The fourth proportional to 878.44, 1,315.78 and 569.37 is: 852.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    878.44 : 1,315.78 = 569.37 : x
  2. Step 2: Convert to fraction form
    878.44/1,315.78 = 569.37/x
  3. Step 3: Cross multiply
    878.44x = 1,315.78 × 569.37
  4. Step 4: Simplify right side
    878.44x = 749,171.30
  5. Step 5: Solve for x
    x = 749,171.30/878.44
  6. Step 6: Final answer
    x = 852.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.