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Finding the Fourth Proportional to 968.64, 1,453.38 and 691.32

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Solution

The fourth proportional to 968.64, 1,453.38 and 691.32 is: 1,037.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.64 : 1,453.38 = 691.32 : x
  2. Step 2: Convert to fraction form
    968.64/1,453.38 = 691.32/x
  3. Step 3: Cross multiply
    968.64x = 1,453.38 × 691.32
  4. Step 4: Simplify right side
    968.64x = 1,004,750.66
  5. Step 5: Solve for x
    x = 1,004,750.66/968.64
  6. Step 6: Final answer
    x = 1,037.28

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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.