Home / 2,405.20-3,306.32-2,167.60

Finding the Fourth Proportional to 2,405.20, 3,306.32 and 2,167.60

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Solution

The fourth proportional to 2,405.20, 3,306.32 and 2,167.60 is: 2,979.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,405.20 : 3,306.32 = 2,167.60 : x
  2. Step 2: Convert to fraction form
    2,405.20/3,306.32 = 2,167.60/x
  3. Step 3: Cross multiply
    2,405.20x = 3,306.32 × 2,167.60
  4. Step 4: Simplify right side
    2,405.20x = 7,166,779.23
  5. Step 5: Solve for x
    x = 7,166,779.23/2,405.20
  6. Step 6: Final answer
    x = 2,979.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.