Home / 1,087.35-1,631.28-356.88

Finding the Fourth Proportional to 1,087.35, 1,631.28 and 356.88

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Solution

The fourth proportional to 1,087.35, 1,631.28 and 356.88 is: 535.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.35 : 1,631.28 = 356.88 : x
  2. Step 2: Convert to fraction form
    1,087.35/1,631.28 = 356.88/x
  3. Step 3: Cross multiply
    1,087.35x = 1,631.28 × 356.88
  4. Step 4: Simplify right side
    1,087.35x = 582,178.66
  5. Step 5: Solve for x
    x = 582,178.66/1,087.35
  6. Step 6: Final answer
    x = 535.41

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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.