Home / 2,949.81-4,069.20-2,390.91

Finding the Fourth Proportional to 2,949.81, 4,069.20 and 2,390.91

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Solution

The fourth proportional to 2,949.81, 4,069.20 and 2,390.91 is: 3,298.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,949.81 : 4,069.20 = 2,390.91 : x
  2. Step 2: Convert to fraction form
    2,949.81/4,069.20 = 2,390.91/x
  3. Step 3: Cross multiply
    2,949.81x = 4,069.20 × 2,390.91
  4. Step 4: Simplify right side
    2,949.81x = 9,729,070.63
  5. Step 5: Solve for x
    x = 9,729,070.63/2,949.81
  6. Step 6: Final answer
    x = 3,298.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.