Home / 1,721.40-2,581.80-488.55

Finding the Fourth Proportional to 1,721.40, 2,581.80 and 488.55

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Solution

The fourth proportional to 1,721.40, 2,581.80 and 488.55 is: 732.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.40 : 2,581.80 = 488.55 : x
  2. Step 2: Convert to fraction form
    1,721.40/2,581.80 = 488.55/x
  3. Step 3: Cross multiply
    1,721.40x = 2,581.80 × 488.55
  4. Step 4: Simplify right side
    1,721.40x = 1,261,338.39
  5. Step 5: Solve for x
    x = 1,261,338.39/1,721.40
  6. Step 6: Final answer
    x = 732.74

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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.