Home / 1,112.31-1,669.07-625.40

Finding the Fourth Proportional to 1,112.31, 1,669.07 and 625.40

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Solution

The fourth proportional to 1,112.31, 1,669.07 and 625.40 is: 938.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.31 : 1,669.07 = 625.40 : x
  2. Step 2: Convert to fraction form
    1,112.31/1,669.07 = 625.40/x
  3. Step 3: Cross multiply
    1,112.31x = 1,669.07 × 625.40
  4. Step 4: Simplify right side
    1,112.31x = 1,043,836.38
  5. Step 5: Solve for x
    x = 1,043,836.38/1,112.31
  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.