Home / 1,728.87-2,385.84-982.81

Finding the Fourth Proportional to 1,728.87, 2,385.84 and 982.81

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Solution

The fourth proportional to 1,728.87, 2,385.84 and 982.81 is: 1,356.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.87 : 2,385.84 = 982.81 : x
  2. Step 2: Convert to fraction form
    1,728.87/2,385.84 = 982.81/x
  3. Step 3: Cross multiply
    1,728.87x = 2,385.84 × 982.81
  4. Step 4: Simplify right side
    1,728.87x = 2,344,818.99
  5. Step 5: Solve for x
    x = 2,344,818.99/1,728.87
  6. Step 6: Final answer
    x = 1,356.27

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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.