Home / 1,087.21-1,631.05-356.76

Finding the Fourth Proportional to 1,087.21, 1,631.05 and 356.76

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Solution

The fourth proportional to 1,087.21, 1,631.05 and 356.76 is: 535.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.21 : 1,631.05 = 356.76 : x
  2. Step 2: Convert to fraction form
    1,087.21/1,631.05 = 356.76/x
  3. Step 3: Cross multiply
    1,087.21x = 1,631.05 × 356.76
  4. Step 4: Simplify right side
    1,087.21x = 581,893.40
  5. Step 5: Solve for x
    x = 581,893.40/1,087.21
  6. Step 6: Final answer
    x = 535.22

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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.