Home / 1,975.20-2,726.31-1,228.71

Finding the Fourth Proportional to 1,975.20, 2,726.31 and 1,228.71

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Solution

The fourth proportional to 1,975.20, 2,726.31 and 1,228.71 is: 1,695.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,975.20 : 2,726.31 = 1,228.71 : x
  2. Step 2: Convert to fraction form
    1,975.20/2,726.31 = 1,228.71/x
  3. Step 3: Cross multiply
    1,975.20x = 2,726.31 × 1,228.71
  4. Step 4: Simplify right side
    1,975.20x = 3,349,848.97
  5. Step 5: Solve for x
    x = 3,349,848.97/1,975.20
  6. Step 6: Final answer
    x = 1,695.96

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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.