Home / 1,935.76-2,671.36-1,139.11

Finding the Fourth Proportional to 1,935.76, 2,671.36 and 1,139.11

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Solution

The fourth proportional to 1,935.76, 2,671.36 and 1,139.11 is: 1,571.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,935.76 : 2,671.36 = 1,139.11 : x
  2. Step 2: Convert to fraction form
    1,935.76/2,671.36 = 1,139.11/x
  3. Step 3: Cross multiply
    1,935.76x = 2,671.36 × 1,139.11
  4. Step 4: Simplify right side
    1,935.76x = 3,042,978.39
  5. Step 5: Solve for x
    x = 3,042,978.39/1,935.76
  6. Step 6: Final answer
    x = 1,571.98

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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.