Home / 1,881.20-2,821.80-1,225.10

Finding the Fourth Proportional to 1,881.20, 2,821.80 and 1,225.10

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Solution

The fourth proportional to 1,881.20, 2,821.80 and 1,225.10 is: 1,837.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,881.20 : 2,821.80 = 1,225.10 : x
  2. Step 2: Convert to fraction form
    1,881.20/2,821.80 = 1,225.10/x
  3. Step 3: Cross multiply
    1,881.20x = 2,821.80 × 1,225.10
  4. Step 4: Simplify right side
    1,881.20x = 3,456,987.18
  5. Step 5: Solve for x
    x = 3,456,987.18/1,881.20
  6. Step 6: Final answer
    x = 1,837.65

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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.