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Finding the Fourth Proportional to 957.38, 1,321.20 and 564.66

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Solution

The fourth proportional to 957.38, 1,321.20 and 564.66 is: 779.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.38 : 1,321.20 = 564.66 : x
  2. Step 2: Convert to fraction form
    957.38/1,321.20 = 564.66/x
  3. Step 3: Cross multiply
    957.38x = 1,321.20 × 564.66
  4. Step 4: Simplify right side
    957.38x = 746,028.79
  5. Step 5: Solve for x
    x = 746,028.79/957.38
  6. Step 6: Final answer
    x = 779.24

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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.