Home / 3,517.40-5,276.10-1,978.20

Finding the Fourth Proportional to 3,517.40, 5,276.10 and 1,978.20

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Solution

The fourth proportional to 3,517.40, 5,276.10 and 1,978.20 is: 2,967.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,517.40 : 5,276.10 = 1,978.20 : x
  2. Step 2: Convert to fraction form
    3,517.40/5,276.10 = 1,978.20/x
  3. Step 3: Cross multiply
    3,517.40x = 5,276.10 × 1,978.20
  4. Step 4: Simplify right side
    3,517.40x = 10,437,181.02
  5. Step 5: Solve for x
    x = 10,437,181.02/3,517.40
  6. Step 6: Final answer
    x = 2,967.30

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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.