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Finding the Fourth Proportional to 950.76, 1,423.26 and 878.76

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Solution

The fourth proportional to 950.76, 1,423.26 and 878.76 is: 1,315.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.76 : 1,423.26 = 878.76 : x
  2. Step 2: Convert to fraction form
    950.76/1,423.26 = 878.76/x
  3. Step 3: Cross multiply
    950.76x = 1,423.26 × 878.76
  4. Step 4: Simplify right side
    950.76x = 1,250,703.96
  5. Step 5: Solve for x
    x = 1,250,703.96/950.76
  6. Step 6: Final answer
    x = 1,315.48

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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.