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Finding the Fourth Proportional to 2,317.64, 3,474.81 and 856.62

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Solution

The fourth proportional to 2,317.64, 3,474.81 and 856.62 is: 1,284.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,317.64 : 3,474.81 = 856.62 : x
  2. Step 2: Convert to fraction form
    2,317.64/3,474.81 = 856.62/x
  3. Step 3: Cross multiply
    2,317.64x = 3,474.81 × 856.62
  4. Step 4: Simplify right side
    2,317.64x = 2,976,591.74
  5. Step 5: Solve for x
    x = 2,976,591.74/2,317.64
  6. Step 6: Final answer
    x = 1,284.32

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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.