Home / 1,087.87-1,631.96-625.57

Finding the Fourth Proportional to 1,087.87, 1,631.96 and 625.57

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Solution

The fourth proportional to 1,087.87, 1,631.96 and 625.57 is: 938.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.87 : 1,631.96 = 625.57 : x
  2. Step 2: Convert to fraction form
    1,087.87/1,631.96 = 625.57/x
  3. Step 3: Cross multiply
    1,087.87x = 1,631.96 × 625.57
  4. Step 4: Simplify right side
    1,087.87x = 1,020,905.22
  5. Step 5: Solve for x
    x = 1,020,905.22/1,087.87
  6. Step 6: Final answer
    x = 938.44

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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.