Home / 2,816.80-4,224.87-869.14

Finding the Fourth Proportional to 2,816.80, 4,224.87 and 869.14

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Solution

The fourth proportional to 2,816.80, 4,224.87 and 869.14 is: 1,303.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,816.80 : 4,224.87 = 869.14 : x
  2. Step 2: Convert to fraction form
    2,816.80/4,224.87 = 869.14/x
  3. Step 3: Cross multiply
    2,816.80x = 4,224.87 × 869.14
  4. Step 4: Simplify right side
    2,816.80x = 3,672,003.51
  5. Step 5: Solve for x
    x = 3,672,003.51/2,816.80
  6. Step 6: Final answer
    x = 1,303.61

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1.5x scale

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.