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Finding the Fourth Proportional to 2,320.15, 3,479.87 and 760.31

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Solution

The fourth proportional to 2,320.15, 3,479.87 and 760.31 is: 1,140.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,320.15 : 3,479.87 = 760.31 : x
  2. Step 2: Convert to fraction form
    2,320.15/3,479.87 = 760.31/x
  3. Step 3: Cross multiply
    2,320.15x = 3,479.87 × 760.31
  4. Step 4: Simplify right side
    2,320.15x = 2,645,786.76
  5. Step 5: Solve for x
    x = 2,645,786.76/2,320.15
  6. Step 6: Final answer
    x = 1,140.35

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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.