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Finding the Fourth Proportional to 960.64, 1,429.43 and 957.40

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Solution

The fourth proportional to 960.64, 1,429.43 and 957.40 is: 1,424.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.64 : 1,429.43 = 957.40 : x
  2. Step 2: Convert to fraction form
    960.64/1,429.43 = 957.40/x
  3. Step 3: Cross multiply
    960.64x = 1,429.43 × 957.40
  4. Step 4: Simplify right side
    960.64x = 1,368,536.28
  5. Step 5: Solve for x
    x = 1,368,536.28/960.64
  6. Step 6: Final answer
    x = 1,424.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.