Home / 1,100.20-1,647.06-812.92

Finding the Fourth Proportional to 1,100.20, 1,647.06 and 812.92

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Solution

The fourth proportional to 1,100.20, 1,647.06 and 812.92 is: 1,216.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.20 : 1,647.06 = 812.92 : x
  2. Step 2: Convert to fraction form
    1,100.20/1,647.06 = 812.92/x
  3. Step 3: Cross multiply
    1,100.20x = 1,647.06 × 812.92
  4. Step 4: Simplify right side
    1,100.20x = 1,338,928.02
  5. Step 5: Solve for x
    x = 1,338,928.02/1,100.20
  6. Step 6: Final answer
    x = 1,216.99

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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.