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Finding the Fourth Proportional to 2,102.57, 2,901.19 and 1,218.22

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Solution

The fourth proportional to 2,102.57, 2,901.19 and 1,218.22 is: 1,680.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,102.57 : 2,901.19 = 1,218.22 : x
  2. Step 2: Convert to fraction form
    2,102.57/2,901.19 = 1,218.22/x
  3. Step 3: Cross multiply
    2,102.57x = 2,901.19 × 1,218.22
  4. Step 4: Simplify right side
    2,102.57x = 3,534,287.68
  5. Step 5: Solve for x
    x = 3,534,287.68/2,102.57
  6. Step 6: Final answer
    x = 1,680.94

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1.5x scale

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.