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Finding the Fourth Proportional to 1,147.47, 1,720.68 and 367.32

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Solution

The fourth proportional to 1,147.47, 1,720.68 and 367.32 is: 550.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.47 : 1,720.68 = 367.32 : x
  2. Step 2: Convert to fraction form
    1,147.47/1,720.68 = 367.32/x
  3. Step 3: Cross multiply
    1,147.47x = 1,720.68 × 367.32
  4. Step 4: Simplify right side
    1,147.47x = 632,040.18
  5. Step 5: Solve for x
    x = 632,040.18/1,147.47
  6. Step 6: Final answer
    x = 550.81

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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.