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Finding the Fourth Proportional to 2,617.66, 3,611.91 and 1,920.70

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Solution

The fourth proportional to 2,617.66, 3,611.91 and 1,920.70 is: 2,650.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,617.66 : 3,611.91 = 1,920.70 : x
  2. Step 2: Convert to fraction form
    2,617.66/3,611.91 = 1,920.70/x
  3. Step 3: Cross multiply
    2,617.66x = 3,611.91 × 1,920.70
  4. Step 4: Simplify right side
    2,617.66x = 6,937,395.54
  5. Step 5: Solve for x
    x = 6,937,395.54/2,617.66
  6. Step 6: Final answer
    x = 2,650.23

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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.