Home / 1,431.14-1,974.94-801.72

Finding the Fourth Proportional to 1,431.14, 1,974.94 and 801.72

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Solution

The fourth proportional to 1,431.14, 1,974.94 and 801.72 is: 1,106.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.14 : 1,974.94 = 801.72 : x
  2. Step 2: Convert to fraction form
    1,431.14/1,974.94 = 801.72/x
  3. Step 3: Cross multiply
    1,431.14x = 1,974.94 × 801.72
  4. Step 4: Simplify right side
    1,431.14x = 1,583,348.90
  5. Step 5: Solve for x
    x = 1,583,348.90/1,431.14
  6. Step 6: Final answer
    x = 1,106.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.