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Finding the Fourth Proportional to 696.96, 1,043.28 and 453.12

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Solution

The fourth proportional to 696.96, 1,043.28 and 453.12 is: 678.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.96 : 1,043.28 = 453.12 : x
  2. Step 2: Convert to fraction form
    696.96/1,043.28 = 453.12/x
  3. Step 3: Cross multiply
    696.96x = 1,043.28 × 453.12
  4. Step 4: Simplify right side
    696.96x = 472,731.03
  5. Step 5: Solve for x
    x = 472,731.03/696.96
  6. Step 6: Final answer
    x = 678.28

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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.