Home / 1,728.45-2,385.36-982.44

Finding the Fourth Proportional to 1,728.45, 2,385.36 and 982.44

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Solution

The fourth proportional to 1,728.45, 2,385.36 and 982.44 is: 1,355.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.45 : 2,385.36 = 982.44 : x
  2. Step 2: Convert to fraction form
    1,728.45/2,385.36 = 982.44/x
  3. Step 3: Cross multiply
    1,728.45x = 2,385.36 × 982.44
  4. Step 4: Simplify right side
    1,728.45x = 2,343,473.08
  5. Step 5: Solve for x
    x = 2,343,473.08/1,728.45
  6. Step 6: Final answer
    x = 1,355.82

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1.5x scale

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.