Home / 2,109.45-2,911.14-1,225.35

Finding the Fourth Proportional to 2,109.45, 2,911.14 and 1,225.35

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Solution

The fourth proportional to 2,109.45, 2,911.14 and 1,225.35 is: 1,691.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,109.45 : 2,911.14 = 1,225.35 : x
  2. Step 2: Convert to fraction form
    2,109.45/2,911.14 = 1,225.35/x
  3. Step 3: Cross multiply
    2,109.45x = 2,911.14 × 1,225.35
  4. Step 4: Simplify right side
    2,109.45x = 3,567,165.40
  5. Step 5: Solve for x
    x = 3,567,165.40/2,109.45
  6. Step 6: Final answer
    x = 1,691.04

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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.