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Finding the Fourth Proportional to 1,147.14, 1,720.38 and 453.68

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Solution

The fourth proportional to 1,147.14, 1,720.38 and 453.68 is: 680.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.14 : 1,720.38 = 453.68 : x
  2. Step 2: Convert to fraction form
    1,147.14/1,720.38 = 453.68/x
  3. Step 3: Cross multiply
    1,147.14x = 1,720.38 × 453.68
  4. Step 4: Simplify right side
    1,147.14x = 780,502.00
  5. Step 5: Solve for x
    x = 780,502.00/1,147.14
  6. Step 6: Final answer
    x = 680.39

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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.