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Finding the Fourth Proportional to 953.24, 1,315.56 and 878.79

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Solution

The fourth proportional to 953.24, 1,315.56 and 878.79 is: 1,212.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.24 : 1,315.56 = 878.79 : x
  2. Step 2: Convert to fraction form
    953.24/1,315.56 = 878.79/x
  3. Step 3: Cross multiply
    953.24x = 1,315.56 × 878.79
  4. Step 4: Simplify right side
    953.24x = 1,156,100.97
  5. Step 5: Solve for x
    x = 1,156,100.97/953.24
  6. Step 6: Final answer
    x = 1,212.81

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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.