Home / 1,680.91-2,531.43-1,422.63

Finding the Fourth Proportional to 1,680.91, 2,531.43 and 1,422.63

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Solution

The fourth proportional to 1,680.91, 2,531.43 and 1,422.63 is: 2,142.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.91 : 2,531.43 = 1,422.63 : x
  2. Step 2: Convert to fraction form
    1,680.91/2,531.43 = 1,422.63/x
  3. Step 3: Cross multiply
    1,680.91x = 2,531.43 × 1,422.63
  4. Step 4: Simplify right side
    1,680.91x = 3,601,288.26
  5. Step 5: Solve for x
    x = 3,601,288.26/1,680.91
  6. Step 6: Final answer
    x = 2,142.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.