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Finding the Fourth Proportional to 2,724.64, 4,086.01 and 776.32

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Solution

The fourth proportional to 2,724.64, 4,086.01 and 776.32 is: 1,164.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,724.64 : 4,086.01 = 776.32 : x
  2. Step 2: Convert to fraction form
    2,724.64/4,086.01 = 776.32/x
  3. Step 3: Cross multiply
    2,724.64x = 4,086.01 × 776.32
  4. Step 4: Simplify right side
    2,724.64x = 3,172,051.28
  5. Step 5: Solve for x
    x = 3,172,051.28/2,724.64
  6. Step 6: Final answer
    x = 1,164.21

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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.