Home / 1,391.80-2,087.64-1,356.92

Finding the Fourth Proportional to 1,391.80, 2,087.64 and 1,356.92

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Solution

The fourth proportional to 1,391.80, 2,087.64 and 1,356.92 is: 2,035.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.80 : 2,087.64 = 1,356.92 : x
  2. Step 2: Convert to fraction form
    1,391.80/2,087.64 = 1,356.92/x
  3. Step 3: Cross multiply
    1,391.80x = 2,087.64 × 1,356.92
  4. Step 4: Simplify right side
    1,391.80x = 2,832,760.47
  5. Step 5: Solve for x
    x = 2,832,760.47/1,391.80
  6. Step 6: Final answer
    x = 2,035.32

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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.