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Finding the Fourth Proportional to 1,147.42, 1,720.70 and 367.22

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Solution

The fourth proportional to 1,147.42, 1,720.70 and 367.22 is: 550.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.42 : 1,720.70 = 367.22 : x
  2. Step 2: Convert to fraction form
    1,147.42/1,720.70 = 367.22/x
  3. Step 3: Cross multiply
    1,147.42x = 1,720.70 × 367.22
  4. Step 4: Simplify right side
    1,147.42x = 631,865.01
  5. Step 5: Solve for x
    x = 631,865.01/1,147.42
  6. Step 6: Final answer
    x = 550.68

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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.