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Finding the Fourth Proportional to 957.22, 1,439.02 and 764.64

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Solution

The fourth proportional to 957.22, 1,439.02 and 764.64 is: 1,149.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.22 : 1,439.02 = 764.64 : x
  2. Step 2: Convert to fraction form
    957.22/1,439.02 = 764.64/x
  3. Step 3: Cross multiply
    957.22x = 1,439.02 × 764.64
  4. Step 4: Simplify right side
    957.22x = 1,100,332.25
  5. Step 5: Solve for x
    x = 1,100,332.25/957.22
  6. Step 6: Final answer
    x = 1,149.51

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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.