Home / 1,087.14-1,631.39-625.82

Finding the Fourth Proportional to 1,087.14, 1,631.39 and 625.82

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Solution

The fourth proportional to 1,087.14, 1,631.39 and 625.82 is: 939.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.14 : 1,631.39 = 625.82 : x
  2. Step 2: Convert to fraction form
    1,087.14/1,631.39 = 625.82/x
  3. Step 3: Cross multiply
    1,087.14x = 1,631.39 × 625.82
  4. Step 4: Simplify right side
    1,087.14x = 1,020,949.28
  5. Step 5: Solve for x
    x = 1,020,949.28/1,087.14
  6. Step 6: Final answer
    x = 939.12

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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.