Home / 1,637.20-2,259.87-1,217.42

Finding the Fourth Proportional to 1,637.20, 2,259.87 and 1,217.42

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Solution

The fourth proportional to 1,637.20, 2,259.87 and 1,217.42 is: 1,680.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,637.20 : 2,259.87 = 1,217.42 : x
  2. Step 2: Convert to fraction form
    1,637.20/2,259.87 = 1,217.42/x
  3. Step 3: Cross multiply
    1,637.20x = 2,259.87 × 1,217.42
  4. Step 4: Simplify right side
    1,637.20x = 2,751,203.55
  5. Step 5: Solve for x
    x = 2,751,203.55/1,637.20
  6. Step 6: Final answer
    x = 1,680.43

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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.