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Finding the Fourth Proportional to 1,086.32, 1,629.62 and 355.65

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Solution

The fourth proportional to 1,086.32, 1,629.62 and 355.65 is: 533.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.32 : 1,629.62 = 355.65 : x
  2. Step 2: Convert to fraction form
    1,086.32/1,629.62 = 355.65/x
  3. Step 3: Cross multiply
    1,086.32x = 1,629.62 × 355.65
  4. Step 4: Simplify right side
    1,086.32x = 579,567.80
  5. Step 5: Solve for x
    x = 579,567.80/1,086.32
  6. Step 6: Final answer
    x = 533.51

Related Problems

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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.