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Finding the Fourth Proportional to 1,147.37, 1,720.79 and 488.53

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Solution

The fourth proportional to 1,147.37, 1,720.79 and 488.53 is: 732.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.37 : 1,720.79 = 488.53 : x
  2. Step 2: Convert to fraction form
    1,147.37/1,720.79 = 488.53/x
  3. Step 3: Cross multiply
    1,147.37x = 1,720.79 × 488.53
  4. Step 4: Simplify right side
    1,147.37x = 840,661.83
  5. Step 5: Solve for x
    x = 840,661.83/1,147.37
  6. Step 6: Final answer
    x = 732.69

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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.