Home / 1,949.40-2,691.12-1,528.80

Finding the Fourth Proportional to 1,949.40, 2,691.12 and 1,528.80

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Solution

The fourth proportional to 1,949.40, 2,691.12 and 1,528.80 is: 2,110.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,949.40 : 2,691.12 = 1,528.80 : x
  2. Step 2: Convert to fraction form
    1,949.40/2,691.12 = 1,528.80/x
  3. Step 3: Cross multiply
    1,949.40x = 2,691.12 × 1,528.80
  4. Step 4: Simplify right side
    1,949.40x = 4,114,184.26
  5. Step 5: Solve for x
    x = 4,114,184.26/1,949.40
  6. Step 6: Final answer
    x = 2,110.49

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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.