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Finding the Fourth Proportional to 2,340.86, 3,230.39 and 1,278.64

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Solution

The fourth proportional to 2,340.86, 3,230.39 and 1,278.64 is: 1,764.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,340.86 : 3,230.39 = 1,278.64 : x
  2. Step 2: Convert to fraction form
    2,340.86/3,230.39 = 1,278.64/x
  3. Step 3: Cross multiply
    2,340.86x = 3,230.39 × 1,278.64
  4. Step 4: Simplify right side
    2,340.86x = 4,130,500.99
  5. Step 5: Solve for x
    x = 4,130,500.99/2,340.86
  6. Step 6: Final answer
    x = 1,764.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.