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Finding the Fourth Proportional to 2,320.92, 3,480.93 and 859.77

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Solution

The fourth proportional to 2,320.92, 3,480.93 and 859.77 is: 1,289.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,320.92 : 3,480.93 = 859.77 : x
  2. Step 2: Convert to fraction form
    2,320.92/3,480.93 = 859.77/x
  3. Step 3: Cross multiply
    2,320.92x = 3,480.93 × 859.77
  4. Step 4: Simplify right side
    2,320.92x = 2,992,799.19
  5. Step 5: Solve for x
    x = 2,992,799.19/2,320.92
  6. Step 6: Final answer
    x = 1,289.49

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1.5x scale

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.