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Finding the Fourth Proportional to 2,320.64, 3,479.31 and 859.62

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Solution

The fourth proportional to 2,320.64, 3,479.31 and 859.62 is: 1,288.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,320.64 : 3,479.31 = 859.62 : x
  2. Step 2: Convert to fraction form
    2,320.64/3,479.31 = 859.62/x
  3. Step 3: Cross multiply
    2,320.64x = 3,479.31 × 859.62
  4. Step 4: Simplify right side
    2,320.64x = 2,990,884.46
  5. Step 5: Solve for x
    x = 2,990,884.46/2,320.64
  6. Step 6: Final answer
    x = 1,288.82

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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.