Home / 1,087.27-1,631.01-394.21

Finding the Fourth Proportional to 1,087.27, 1,631.01 and 394.21

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Solution

The fourth proportional to 1,087.27, 1,631.01 and 394.21 is: 591.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.27 : 1,631.01 = 394.21 : x
  2. Step 2: Convert to fraction form
    1,087.27/1,631.01 = 394.21/x
  3. Step 3: Cross multiply
    1,087.27x = 1,631.01 × 394.21
  4. Step 4: Simplify right side
    1,087.27x = 642,960.45
  5. Step 5: Solve for x
    x = 642,960.45/1,087.27
  6. Step 6: Final answer
    x = 591.35

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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.