Home / 2,143.50-3,212.60-909.46

Finding the Fourth Proportional to 2,143.50, 3,212.60 and 909.46

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Solution

The fourth proportional to 2,143.50, 3,212.60 and 909.46 is: 1,363.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.50 : 3,212.60 = 909.46 : x
  2. Step 2: Convert to fraction form
    2,143.50/3,212.60 = 909.46/x
  3. Step 3: Cross multiply
    2,143.50x = 3,212.60 × 909.46
  4. Step 4: Simplify right side
    2,143.50x = 2,921,731.20
  5. Step 5: Solve for x
    x = 2,921,731.20/2,143.50
  6. Step 6: Final answer
    x = 1,363.07

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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.