Home / 2,445.90-3,670.39-1,278.00

Finding the Fourth Proportional to 2,445.90, 3,670.39 and 1,278.00

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Solution

The fourth proportional to 2,445.90, 3,670.39 and 1,278.00 is: 1,917.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,445.90 : 3,670.39 = 1,278.00 : x
  2. Step 2: Convert to fraction form
    2,445.90/3,670.39 = 1,278.00/x
  3. Step 3: Cross multiply
    2,445.90x = 3,670.39 × 1,278.00
  4. Step 4: Simplify right side
    2,445.90x = 4,690,766.75
  5. Step 5: Solve for x
    x = 4,690,766.75/2,445.90
  6. Step 6: Final answer
    x = 1,917.81

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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.