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Finding the Fourth Proportional to 2,320.74, 3,480.03 and 859.77

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Solution

The fourth proportional to 2,320.74, 3,480.03 and 859.77 is: 1,289.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,320.74 : 3,480.03 = 859.77 : x
  2. Step 2: Convert to fraction form
    2,320.74/3,480.03 = 859.77/x
  3. Step 3: Cross multiply
    2,320.74x = 3,480.03 × 859.77
  4. Step 4: Simplify right side
    2,320.74x = 2,992,025.39
  5. Step 5: Solve for x
    x = 2,992,025.39/2,320.74
  6. Step 6: Final answer
    x = 1,289.25

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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.