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Finding the Fourth Proportional to 957.24, 1,431.97 and 858.83

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Solution

The fourth proportional to 957.24, 1,431.97 and 858.83 is: 1,284.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.24 : 1,431.97 = 858.83 : x
  2. Step 2: Convert to fraction form
    957.24/1,431.97 = 858.83/x
  3. Step 3: Cross multiply
    957.24x = 1,431.97 × 858.83
  4. Step 4: Simplify right side
    957.24x = 1,229,809.49
  5. Step 5: Solve for x
    x = 1,229,809.49/957.24
  6. Step 6: Final answer
    x = 1,284.75

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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.