Home / 2,209.34-3,311.93-747.47

Finding the Fourth Proportional to 2,209.34, 3,311.93 and 747.47

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Solution

The fourth proportional to 2,209.34, 3,311.93 and 747.47 is: 1,120.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,209.34 : 3,311.93 = 747.47 : x
  2. Step 2: Convert to fraction form
    2,209.34/3,311.93 = 747.47/x
  3. Step 3: Cross multiply
    2,209.34x = 3,311.93 × 747.47
  4. Step 4: Simplify right side
    2,209.34x = 2,475,553.63
  5. Step 5: Solve for x
    x = 2,475,553.63/2,209.34
  6. Step 6: Final answer
    x = 1,120.50

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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.