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Finding the Fourth Proportional to 768, 1,059.96 and 453.36

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Solution

The fourth proportional to 768, 1,059.96 and 453.36 is: 625.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    768 : 1,059.96 = 453.36 : x
  2. Step 2: Convert to fraction form
    768/1,059.96 = 453.36/x
  3. Step 3: Cross multiply
    768x = 1,059.96 × 453.36
  4. Step 4: Simplify right side
    768x = 480,543.47
  5. Step 5: Solve for x
    x = 480,543.47/768
  6. Step 6: Final answer
    x = 625.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.