Home / 3,420.88-5,127.48-1,690.72

Finding the Fourth Proportional to 3,420.88, 5,127.48 and 1,690.72

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Solution

The fourth proportional to 3,420.88, 5,127.48 and 1,690.72 is: 2,534.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.88 : 5,127.48 = 1,690.72 : x
  2. Step 2: Convert to fraction form
    3,420.88/5,127.48 = 1,690.72/x
  3. Step 3: Cross multiply
    3,420.88x = 5,127.48 × 1,690.72
  4. Step 4: Simplify right side
    3,420.88x = 8,669,132.99
  5. Step 5: Solve for x
    x = 8,669,132.99/3,420.88
  6. Step 6: Final answer
    x = 2,534.18

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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.