Home / 1,638.20-2,264.26-1,199.18

Finding the Fourth Proportional to 1,638.20, 2,264.26 and 1,199.18

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Solution

The fourth proportional to 1,638.20, 2,264.26 and 1,199.18 is: 1,657.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.20 : 2,264.26 = 1,199.18 : x
  2. Step 2: Convert to fraction form
    1,638.20/2,264.26 = 1,199.18/x
  3. Step 3: Cross multiply
    1,638.20x = 2,264.26 × 1,199.18
  4. Step 4: Simplify right side
    1,638.20x = 2,715,255.31
  5. Step 5: Solve for x
    x = 2,715,255.31/1,638.20
  6. Step 6: Final answer
    x = 1,657.46

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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.