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Finding the Fourth Proportional to 1,969.79, 2,722.24 and 1,615.17

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Solution

The fourth proportional to 1,969.79, 2,722.24 and 1,615.17 is: 2,232.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969.79 : 2,722.24 = 1,615.17 : x
  2. Step 2: Convert to fraction form
    1,969.79/2,722.24 = 1,615.17/x
  3. Step 3: Cross multiply
    1,969.79x = 2,722.24 × 1,615.17
  4. Step 4: Simplify right side
    1,969.79x = 4,396,862.10
  5. Step 5: Solve for x
    x = 4,396,862.10/1,969.79
  6. Step 6: Final answer
    x = 2,232.14

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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.