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Finding the Fourth Proportional to 1,976.99, 2,726.20 and 1,698.15

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Solution

The fourth proportional to 1,976.99, 2,726.20 and 1,698.15 is: 2,341.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,976.99 : 2,726.20 = 1,698.15 : x
  2. Step 2: Convert to fraction form
    1,976.99/2,726.20 = 1,698.15/x
  3. Step 3: Cross multiply
    1,976.99x = 2,726.20 × 1,698.15
  4. Step 4: Simplify right side
    1,976.99x = 4,629,496.53
  5. Step 5: Solve for x
    x = 4,629,496.53/1,976.99
  6. Step 6: Final answer
    x = 2,341.69

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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.