Home / 1,086.21-1,629.55-355.76

Finding the Fourth Proportional to 1,086.21, 1,629.55 and 355.76

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Solution

The fourth proportional to 1,086.21, 1,629.55 and 355.76 is: 533.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.21 : 1,629.55 = 355.76 : x
  2. Step 2: Convert to fraction form
    1,086.21/1,629.55 = 355.76/x
  3. Step 3: Cross multiply
    1,086.21x = 1,629.55 × 355.76
  4. Step 4: Simplify right side
    1,086.21x = 579,727.12
  5. Step 5: Solve for x
    x = 579,727.12/1,086.21
  6. Step 6: Final answer
    x = 533.72

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Double scale
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1.5x scale

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.