Home / 1,086.13-1,628.85-355.53

Finding the Fourth Proportional to 1,086.13, 1,628.85 and 355.53

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Solution

The fourth proportional to 1,086.13, 1,628.85 and 355.53 is: 533.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.13 : 1,628.85 = 355.53 : x
  2. Step 2: Convert to fraction form
    1,086.13/1,628.85 = 355.53/x
  3. Step 3: Cross multiply
    1,086.13x = 1,628.85 × 355.53
  4. Step 4: Simplify right side
    1,086.13x = 579,105.04
  5. Step 5: Solve for x
    x = 579,105.04/1,086.13
  6. Step 6: Final answer
    x = 533.18

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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.