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Finding the Fourth Proportional to 1,816.22, 2,723.16 and 776.90

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Solution

The fourth proportional to 1,816.22, 2,723.16 and 776.90 is: 1,164.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,816.22 : 2,723.16 = 776.90 : x
  2. Step 2: Convert to fraction form
    1,816.22/2,723.16 = 776.90/x
  3. Step 3: Cross multiply
    1,816.22x = 2,723.16 × 776.90
  4. Step 4: Simplify right side
    1,816.22x = 2,115,623.00
  5. Step 5: Solve for x
    x = 2,115,623.00/1,816.22
  6. Step 6: Final answer
    x = 1,164.85

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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.