Home / 2,179.60-3,261.30-1,985.20

Finding the Fourth Proportional to 2,179.60, 3,261.30 and 1,985.20

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Solution

The fourth proportional to 2,179.60, 3,261.30 and 1,985.20 is: 2,970.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.60 : 3,261.30 = 1,985.20 : x
  2. Step 2: Convert to fraction form
    2,179.60/3,261.30 = 1,985.20/x
  3. Step 3: Cross multiply
    2,179.60x = 3,261.30 × 1,985.20
  4. Step 4: Simplify right side
    2,179.60x = 6,474,332.76
  5. Step 5: Solve for x
    x = 6,474,332.76/2,179.60
  6. Step 6: Final answer
    x = 2,970.42

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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.