Home / 1,085.94-1,629.05-392.51

Finding the Fourth Proportional to 1,085.94, 1,629.05 and 392.51

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Solution

The fourth proportional to 1,085.94, 1,629.05 and 392.51 is: 588.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085.94 : 1,629.05 = 392.51 : x
  2. Step 2: Convert to fraction form
    1,085.94/1,629.05 = 392.51/x
  3. Step 3: Cross multiply
    1,085.94x = 1,629.05 × 392.51
  4. Step 4: Simplify right side
    1,085.94x = 639,420.53
  5. Step 5: Solve for x
    x = 639,420.53/1,085.94
  6. Step 6: Final answer
    x = 588.82

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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.