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Finding the Fourth Proportional to 964.64, 1,340.43 and 954.60

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Solution

The fourth proportional to 964.64, 1,340.43 and 954.60 is: 1,326.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.64 : 1,340.43 = 954.60 : x
  2. Step 2: Convert to fraction form
    964.64/1,340.43 = 954.60/x
  3. Step 3: Cross multiply
    964.64x = 1,340.43 × 954.60
  4. Step 4: Simplify right side
    964.64x = 1,279,574.48
  5. Step 5: Solve for x
    x = 1,279,574.48/964.64
  6. Step 6: Final answer
    x = 1,326.49

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.