Home / 1,788.66-2,455.19-1,587.78

Finding the Fourth Proportional to 1,788.66, 2,455.19 and 1,587.78

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Solution

The fourth proportional to 1,788.66, 2,455.19 and 1,587.78 is: 2,179.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,788.66 : 2,455.19 = 1,587.78 : x
  2. Step 2: Convert to fraction form
    1,788.66/2,455.19 = 1,587.78/x
  3. Step 3: Cross multiply
    1,788.66x = 2,455.19 × 1,587.78
  4. Step 4: Simplify right side
    1,788.66x = 3,898,293.64
  5. Step 5: Solve for x
    x = 3,898,293.64/1,788.66
  6. Step 6: Final answer
    x = 2,179.45

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.