Home / 2,109.60-2,911.08-1,225.44

Finding the Fourth Proportional to 2,109.60, 2,911.08 and 1,225.44

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Solution

The fourth proportional to 2,109.60, 2,911.08 and 1,225.44 is: 1,691.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,109.60 : 2,911.08 = 1,225.44 : x
  2. Step 2: Convert to fraction form
    2,109.60/2,911.08 = 1,225.44/x
  3. Step 3: Cross multiply
    2,109.60x = 2,911.08 × 1,225.44
  4. Step 4: Simplify right side
    2,109.60x = 3,567,353.88
  5. Step 5: Solve for x
    x = 3,567,353.88/2,109.60
  6. Step 6: Final answer
    x = 1,691.01

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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.