Home / 1,985.41-2,739.20-1,145.82

Finding the Fourth Proportional to 1,985.41, 2,739.20 and 1,145.82

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Solution

The fourth proportional to 1,985.41, 2,739.20 and 1,145.82 is: 1,580.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.41 : 2,739.20 = 1,145.82 : x
  2. Step 2: Convert to fraction form
    1,985.41/2,739.20 = 1,145.82/x
  3. Step 3: Cross multiply
    1,985.41x = 2,739.20 × 1,145.82
  4. Step 4: Simplify right side
    1,985.41x = 3,138,630.14
  5. Step 5: Solve for x
    x = 3,138,630.14/1,985.41
  6. Step 6: Final answer
    x = 1,580.85

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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.