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Finding the Fourth Proportional to 2,539.70, 3,809.55 and 2,215.70

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Solution

The fourth proportional to 2,539.70, 3,809.55 and 2,215.70 is: 3,323.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,539.70 : 3,809.55 = 2,215.70 : x
  2. Step 2: Convert to fraction form
    2,539.70/3,809.55 = 2,215.70/x
  3. Step 3: Cross multiply
    2,539.70x = 3,809.55 × 2,215.70
  4. Step 4: Simplify right side
    2,539.70x = 8,440,819.94
  5. Step 5: Solve for x
    x = 8,440,819.94/2,539.70
  6. Step 6: Final answer
    x = 3,323.55

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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.