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Finding the Fourth Proportional to 957.10, 1,434.30 and 668.20

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Solution

The fourth proportional to 957.10, 1,434.30 and 668.20 is: 1,001.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.10 : 1,434.30 = 668.20 : x
  2. Step 2: Convert to fraction form
    957.10/1,434.30 = 668.20/x
  3. Step 3: Cross multiply
    957.10x = 1,434.30 × 668.20
  4. Step 4: Simplify right side
    957.10x = 958,399.26
  5. Step 5: Solve for x
    x = 958,399.26/957.10
  6. Step 6: Final answer
    x = 1,001.36

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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.