Home / 1,905.84-2,629.92-1,120.32

Finding the Fourth Proportional to 1,905.84, 2,629.92 and 1,120.32

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Solution

The fourth proportional to 1,905.84, 2,629.92 and 1,120.32 is: 1,545.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.84 : 2,629.92 = 1,120.32 : x
  2. Step 2: Convert to fraction form
    1,905.84/2,629.92 = 1,120.32/x
  3. Step 3: Cross multiply
    1,905.84x = 2,629.92 × 1,120.32
  4. Step 4: Simplify right side
    1,905.84x = 2,946,351.97
  5. Step 5: Solve for x
    x = 2,946,351.97/1,905.84
  6. Step 6: Final answer
    x = 1,545.96

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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.