Home / 2,160.80-3,241.20-929.60

Finding the Fourth Proportional to 2,160.80, 3,241.20 and 929.60

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Solution

The fourth proportional to 2,160.80, 3,241.20 and 929.60 is: 1,394.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.80 : 3,241.20 = 929.60 : x
  2. Step 2: Convert to fraction form
    2,160.80/3,241.20 = 929.60/x
  3. Step 3: Cross multiply
    2,160.80x = 3,241.20 × 929.60
  4. Step 4: Simplify right side
    2,160.80x = 3,013,019.52
  5. Step 5: Solve for x
    x = 3,013,019.52/2,160.80
  6. Step 6: Final answer
    x = 1,394.40

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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.