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Finding the Fourth Proportional to 957.96, 1,322.20 and 625.84

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Solution

The fourth proportional to 957.96, 1,322.20 and 625.84 is: 863.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.96 : 1,322.20 = 625.84 : x
  2. Step 2: Convert to fraction form
    957.96/1,322.20 = 625.84/x
  3. Step 3: Cross multiply
    957.96x = 1,322.20 × 625.84
  4. Step 4: Simplify right side
    957.96x = 827,485.65
  5. Step 5: Solve for x
    x = 827,485.65/957.96
  6. Step 6: Final answer
    x = 863.80

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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.