Home / 1,921.76-2,883.36-1,152.80

Finding the Fourth Proportional to 1,921.76, 2,883.36 and 1,152.80

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Solution

The fourth proportional to 1,921.76, 2,883.36 and 1,152.80 is: 1,729.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.76 : 2,883.36 = 1,152.80 : x
  2. Step 2: Convert to fraction form
    1,921.76/2,883.36 = 1,152.80/x
  3. Step 3: Cross multiply
    1,921.76x = 2,883.36 × 1,152.80
  4. Step 4: Simplify right side
    1,921.76x = 3,323,937.41
  5. Step 5: Solve for x
    x = 3,323,937.41/1,921.76
  6. Step 6: Final answer
    x = 1,729.63

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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.