Home / 2,153.76-3,231.56-921.44

Finding the Fourth Proportional to 2,153.76, 3,231.56 and 921.44

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Solution

The fourth proportional to 2,153.76, 3,231.56 and 921.44 is: 1,382.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.76 : 3,231.56 = 921.44 : x
  2. Step 2: Convert to fraction form
    2,153.76/3,231.56 = 921.44/x
  3. Step 3: Cross multiply
    2,153.76x = 3,231.56 × 921.44
  4. Step 4: Simplify right side
    2,153.76x = 2,977,688.65
  5. Step 5: Solve for x
    x = 2,977,688.65/2,153.76
  6. Step 6: Final answer
    x = 1,382.55

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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.