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Finding the Fourth Proportional to 2,191.19, 3,287 and 730.45

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Solution

The fourth proportional to 2,191.19, 3,287 and 730.45 is: 1,095.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.19 : 3,287 = 730.45 : x
  2. Step 2: Convert to fraction form
    2,191.19/3,287 = 730.45/x
  3. Step 3: Cross multiply
    2,191.19x = 3,287 × 730.45
  4. Step 4: Simplify right side
    2,191.19x = 2,400,989.15
  5. Step 5: Solve for x
    x = 2,400,989.15/2,191.19
  6. Step 6: Final answer
    x = 1,095.75

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1.5x scale

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.