Home / 1,811.78-2,502.60-1,340.64

Finding the Fourth Proportional to 1,811.78, 2,502.60 and 1,340.64

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Solution

The fourth proportional to 1,811.78, 2,502.60 and 1,340.64 is: 1,851.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.78 : 2,502.60 = 1,340.64 : x
  2. Step 2: Convert to fraction form
    1,811.78/2,502.60 = 1,340.64/x
  3. Step 3: Cross multiply
    1,811.78x = 2,502.60 × 1,340.64
  4. Step 4: Simplify right side
    1,811.78x = 3,355,085.66
  5. Step 5: Solve for x
    x = 3,355,085.66/1,811.78
  6. Step 6: Final answer
    x = 1,851.82

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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.