Home / 2,838.90-4,259.64-1,278.05

Finding the Fourth Proportional to 2,838.90, 4,259.64 and 1,278.05

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Solution

The fourth proportional to 2,838.90, 4,259.64 and 1,278.05 is: 1,917.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,838.90 : 4,259.64 = 1,278.05 : x
  2. Step 2: Convert to fraction form
    2,838.90/4,259.64 = 1,278.05/x
  3. Step 3: Cross multiply
    2,838.90x = 4,259.64 × 1,278.05
  4. Step 4: Simplify right side
    2,838.90x = 5,444,011.60
  5. Step 5: Solve for x
    x = 5,444,011.60/2,838.90
  6. Step 6: Final answer
    x = 1,917.65

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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.