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Finding the Fourth Proportional to 1,086.88, 1,629.48 and 356

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Solution

The fourth proportional to 1,086.88, 1,629.48 and 356 is: 533.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.88 : 1,629.48 = 356 : x
  2. Step 2: Convert to fraction form
    1,086.88/1,629.48 = 356/x
  3. Step 3: Cross multiply
    1,086.88x = 1,629.48 × 356
  4. Step 4: Simplify right side
    1,086.88x = 580,094.88
  5. Step 5: Solve for x
    x = 580,094.88/1,086.88
  6. Step 6: Final answer
    x = 533.72

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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.