Home / 3,122.08-4,308.40-1,705.72

Finding the Fourth Proportional to 3,122.08, 4,308.40 and 1,705.72

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Solution

The fourth proportional to 3,122.08, 4,308.40 and 1,705.72 is: 2,353.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.08 : 4,308.40 = 1,705.72 : x
  2. Step 2: Convert to fraction form
    3,122.08/4,308.40 = 1,705.72/x
  3. Step 3: Cross multiply
    3,122.08x = 4,308.40 × 1,705.72
  4. Step 4: Simplify right side
    3,122.08x = 7,348,924.05
  5. Step 5: Solve for x
    x = 7,348,924.05/3,122.08
  6. Step 6: Final answer
    x = 2,353.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.