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Finding the Fourth Proportional to 2,194.50, 3,291.75 and 655.50

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Solution

The fourth proportional to 2,194.50, 3,291.75 and 655.50 is: 983.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,194.50 : 3,291.75 = 655.50 : x
  2. Step 2: Convert to fraction form
    2,194.50/3,291.75 = 655.50/x
  3. Step 3: Cross multiply
    2,194.50x = 3,291.75 × 655.50
  4. Step 4: Simplify right side
    2,194.50x = 2,157,742.13
  5. Step 5: Solve for x
    x = 2,157,742.13/2,194.50
  6. Step 6: Final answer
    x = 983.25

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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.