Home / 1,722.51-2,583.79-489.87

Finding the Fourth Proportional to 1,722.51, 2,583.79 and 489.87

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Solution

The fourth proportional to 1,722.51, 2,583.79 and 489.87 is: 734.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,722.51 : 2,583.79 = 489.87 : x
  2. Step 2: Convert to fraction form
    1,722.51/2,583.79 = 489.87/x
  3. Step 3: Cross multiply
    1,722.51x = 2,583.79 × 489.87
  4. Step 4: Simplify right side
    1,722.51x = 1,265,719.98
  5. Step 5: Solve for x
    x = 1,265,719.98/1,722.51
  6. Step 6: Final answer
    x = 734.81

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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.