Home / 3,638.40-5,460.24-1,690.80

Finding the Fourth Proportional to 3,638.40, 5,460.24 and 1,690.80

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Solution

The fourth proportional to 3,638.40, 5,460.24 and 1,690.80 is: 2,537.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,638.40 : 5,460.24 = 1,690.80 : x
  2. Step 2: Convert to fraction form
    3,638.40/5,460.24 = 1,690.80/x
  3. Step 3: Cross multiply
    3,638.40x = 5,460.24 × 1,690.80
  4. Step 4: Simplify right side
    3,638.40x = 9,232,173.79
  5. Step 5: Solve for x
    x = 9,232,173.79/3,638.40
  6. Step 6: Final answer
    x = 2,537.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.