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Finding the Fourth Proportional to 957.75, 1,321.07 and 626.56

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Solution

The fourth proportional to 957.75, 1,321.07 and 626.56 is: 864.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.75 : 1,321.07 = 626.56 : x
  2. Step 2: Convert to fraction form
    957.75/1,321.07 = 626.56/x
  3. Step 3: Cross multiply
    957.75x = 1,321.07 × 626.56
  4. Step 4: Simplify right side
    957.75x = 827,729.62
  5. Step 5: Solve for x
    x = 827,729.62/957.75
  6. Step 6: Final answer
    x = 864.24

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1.5x scale

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.