Home / 2,210.80-3,315.30-749.20

Finding the Fourth Proportional to 2,210.80, 3,315.30 and 749.20

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Solution

The fourth proportional to 2,210.80, 3,315.30 and 749.20 is: 1,123.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,210.80 : 3,315.30 = 749.20 : x
  2. Step 2: Convert to fraction form
    2,210.80/3,315.30 = 749.20/x
  3. Step 3: Cross multiply
    2,210.80x = 3,315.30 × 749.20
  4. Step 4: Simplify right side
    2,210.80x = 2,483,822.76
  5. Step 5: Solve for x
    x = 2,483,822.76/2,210.80
  6. Step 6: Final answer
    x = 1,123.50

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Similar ratio
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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.