Home / 1,112.78-1,669.14-625.84

Finding the Fourth Proportional to 1,112.78, 1,669.14 and 625.84

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Solution

The fourth proportional to 1,112.78, 1,669.14 and 625.84 is: 938.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.78 : 1,669.14 = 625.84 : x
  2. Step 2: Convert to fraction form
    1,112.78/1,669.14 = 625.84/x
  3. Step 3: Cross multiply
    1,112.78x = 1,669.14 × 625.84
  4. Step 4: Simplify right side
    1,112.78x = 1,044,610.40
  5. Step 5: Solve for x
    x = 1,044,610.40/1,112.78
  6. Step 6: Final answer
    x = 938.74

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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.