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Finding the Fourth Proportional to 1,147.19, 1,720.18 and 453.83

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Solution

The fourth proportional to 1,147.19, 1,720.18 and 453.83 is: 680.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.19 : 1,720.18 = 453.83 : x
  2. Step 2: Convert to fraction form
    1,147.19/1,720.18 = 453.83/x
  3. Step 3: Cross multiply
    1,147.19x = 1,720.18 × 453.83
  4. Step 4: Simplify right side
    1,147.19x = 780,667.02
  5. Step 5: Solve for x
    x = 780,667.02/1,147.19
  6. Step 6: Final answer
    x = 680.50

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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.