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Finding the Fourth Proportional to 1,816.32, 2,723.68 and 776.28

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Solution

The fourth proportional to 1,816.32, 2,723.68 and 776.28 is: 1,164.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,816.32 : 2,723.68 = 776.28 : x
  2. Step 2: Convert to fraction form
    1,816.32/2,723.68 = 776.28/x
  3. Step 3: Cross multiply
    1,816.32x = 2,723.68 × 776.28
  4. Step 4: Simplify right side
    1,816.32x = 2,114,338.31
  5. Step 5: Solve for x
    x = 2,114,338.31/1,816.32
  6. Step 6: Final answer
    x = 1,164.08

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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.