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Finding the Fourth Proportional to 1,171.29, 1,616.55 and 673.95

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Solution

The fourth proportional to 1,171.29, 1,616.55 and 673.95 is: 930.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.29 : 1,616.55 = 673.95 : x
  2. Step 2: Convert to fraction form
    1,171.29/1,616.55 = 673.95/x
  3. Step 3: Cross multiply
    1,171.29x = 1,616.55 × 673.95
  4. Step 4: Simplify right side
    1,171.29x = 1,089,473.87
  5. Step 5: Solve for x
    x = 1,089,473.87/1,171.29
  6. Step 6: Final answer
    x = 930.15

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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.