Home / 2,215.60-3,320.34-1,120.68

Finding the Fourth Proportional to 2,215.60, 3,320.34 and 1,120.68

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Solution

The fourth proportional to 2,215.60, 3,320.34 and 1,120.68 is: 1,679.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.60 : 3,320.34 = 1,120.68 : x
  2. Step 2: Convert to fraction form
    2,215.60/3,320.34 = 1,120.68/x
  3. Step 3: Cross multiply
    2,215.60x = 3,320.34 × 1,120.68
  4. Step 4: Simplify right side
    2,215.60x = 3,721,038.63
  5. Step 5: Solve for x
    x = 3,721,038.63/2,215.60
  6. Step 6: Final answer
    x = 1,679.47

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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.