Home / 1,087.69-1,631.67-394.27

Finding the Fourth Proportional to 1,087.69, 1,631.67 and 394.27

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Solution

The fourth proportional to 1,087.69, 1,631.67 and 394.27 is: 591.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.69 : 1,631.67 = 394.27 : x
  2. Step 2: Convert to fraction form
    1,087.69/1,631.67 = 394.27/x
  3. Step 3: Cross multiply
    1,087.69x = 1,631.67 × 394.27
  4. Step 4: Simplify right side
    1,087.69x = 643,318.53
  5. Step 5: Solve for x
    x = 643,318.53/1,087.69
  6. Step 6: Final answer
    x = 591.45

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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.