Home / 1,921.84-2,651.40-1,124.80

Finding the Fourth Proportional to 1,921.84, 2,651.40 and 1,124.80

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Solution

The fourth proportional to 1,921.84, 2,651.40 and 1,124.80 is: 1,551.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.84 : 2,651.40 = 1,124.80 : x
  2. Step 2: Convert to fraction form
    1,921.84/2,651.40 = 1,124.80/x
  3. Step 3: Cross multiply
    1,921.84x = 2,651.40 × 1,124.80
  4. Step 4: Simplify right side
    1,921.84x = 2,982,294.72
  5. Step 5: Solve for x
    x = 2,982,294.72/1,921.84
  6. Step 6: Final answer
    x = 1,551.79

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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.