Home / 1,087.91-1,631.89-266.19

Finding the Fourth Proportional to 1,087.91, 1,631.89 and 266.19

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Solution

The fourth proportional to 1,087.91, 1,631.89 and 266.19 is: 399.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.91 : 1,631.89 = 266.19 : x
  2. Step 2: Convert to fraction form
    1,087.91/1,631.89 = 266.19/x
  3. Step 3: Cross multiply
    1,087.91x = 1,631.89 × 266.19
  4. Step 4: Simplify right side
    1,087.91x = 434,391.47
  5. Step 5: Solve for x
    x = 434,391.47/1,087.91
  6. Step 6: Final answer
    x = 399.29

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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.