Home / 1,358.20-2,035.44-991.27

Finding the Fourth Proportional to 1,358.20, 2,035.44 and 991.27

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Solution

The fourth proportional to 1,358.20, 2,035.44 and 991.27 is: 1,485.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.20 : 2,035.44 = 991.27 : x
  2. Step 2: Convert to fraction form
    1,358.20/2,035.44 = 991.27/x
  3. Step 3: Cross multiply
    1,358.20x = 2,035.44 × 991.27
  4. Step 4: Simplify right side
    1,358.20x = 2,017,670.61
  5. Step 5: Solve for x
    x = 2,017,670.61/1,358.20
  6. Step 6: Final answer
    x = 1,485.55

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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.