Home / 2,178.60-3,259.80-1,984.20

Finding the Fourth Proportional to 2,178.60, 3,259.80 and 1,984.20

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Solution

The fourth proportional to 2,178.60, 3,259.80 and 1,984.20 is: 2,968.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.60 : 3,259.80 = 1,984.20 : x
  2. Step 2: Convert to fraction form
    2,178.60/3,259.80 = 1,984.20/x
  3. Step 3: Cross multiply
    2,178.60x = 3,259.80 × 1,984.20
  4. Step 4: Simplify right side
    2,178.60x = 6,468,095.16
  5. Step 5: Solve for x
    x = 6,468,095.16/2,178.60
  6. Step 6: Final answer
    x = 2,968.92

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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.