Home / 1,917.28-2,647.50-1,818.86

Finding the Fourth Proportional to 1,917.28, 2,647.50 and 1,818.86

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Solution

The fourth proportional to 1,917.28, 2,647.50 and 1,818.86 is: 2,511.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.28 : 2,647.50 = 1,818.86 : x
  2. Step 2: Convert to fraction form
    1,917.28/2,647.50 = 1,818.86/x
  3. Step 3: Cross multiply
    1,917.28x = 2,647.50 × 1,818.86
  4. Step 4: Simplify right side
    1,917.28x = 4,815,431.85
  5. Step 5: Solve for x
    x = 4,815,431.85/1,917.28
  6. Step 6: Final answer
    x = 2,511.60

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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.