Home / 2,178.60-3,008.80-1,946.86

Finding the Fourth Proportional to 2,178.60, 3,008.80 and 1,946.86

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Solution

The fourth proportional to 2,178.60, 3,008.80 and 1,946.86 is: 2,688.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.60 : 3,008.80 = 1,946.86 : x
  2. Step 2: Convert to fraction form
    2,178.60/3,008.80 = 1,946.86/x
  3. Step 3: Cross multiply
    2,178.60x = 3,008.80 × 1,946.86
  4. Step 4: Simplify right side
    2,178.60x = 5,857,712.37
  5. Step 5: Solve for x
    x = 5,857,712.37/2,178.60
  6. Step 6: Final answer
    x = 2,688.75

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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.