Home / 2,154.40-3,230.79-921.93

Finding the Fourth Proportional to 2,154.40, 3,230.79 and 921.93

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Solution

The fourth proportional to 2,154.40, 3,230.79 and 921.93 is: 1,382.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.40 : 3,230.79 = 921.93 : x
  2. Step 2: Convert to fraction form
    2,154.40/3,230.79 = 921.93/x
  3. Step 3: Cross multiply
    2,154.40x = 3,230.79 × 921.93
  4. Step 4: Simplify right side
    2,154.40x = 2,978,562.22
  5. Step 5: Solve for x
    x = 2,978,562.22/2,154.40
  6. Step 6: Final answer
    x = 1,382.55

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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.