Home / 1,942.15-2,679.31-1,312.44

Finding the Fourth Proportional to 1,942.15, 2,679.31 and 1,312.44

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Solution

The fourth proportional to 1,942.15, 2,679.31 and 1,312.44 is: 1,810.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,942.15 : 2,679.31 = 1,312.44 : x
  2. Step 2: Convert to fraction form
    1,942.15/2,679.31 = 1,312.44/x
  3. Step 3: Cross multiply
    1,942.15x = 2,679.31 × 1,312.44
  4. Step 4: Simplify right side
    1,942.15x = 3,516,444.12
  5. Step 5: Solve for x
    x = 3,516,444.12/1,942.15
  6. Step 6: Final answer
    x = 1,810.60

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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.