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Finding the Fourth Proportional to 1,171.22, 1,616.30 and 673.90

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Solution

The fourth proportional to 1,171.22, 1,616.30 and 673.90 is: 929.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.22 : 1,616.30 = 673.90 : x
  2. Step 2: Convert to fraction form
    1,171.22/1,616.30 = 673.90/x
  3. Step 3: Cross multiply
    1,171.22x = 1,616.30 × 673.90
  4. Step 4: Simplify right side
    1,171.22x = 1,089,224.57
  5. Step 5: Solve for x
    x = 1,089,224.57/1,171.22
  6. Step 6: Final answer
    x = 929.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.