Home / 1,218.78-1,837.22-1,148.31

Finding the Fourth Proportional to 1,218.78, 1,837.22 and 1,148.31

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Solution

The fourth proportional to 1,218.78, 1,837.22 and 1,148.31 is: 1,730.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.78 : 1,837.22 = 1,148.31 : x
  2. Step 2: Convert to fraction form
    1,218.78/1,837.22 = 1,148.31/x
  3. Step 3: Cross multiply
    1,218.78x = 1,837.22 × 1,148.31
  4. Step 4: Simplify right side
    1,218.78x = 2,109,692.36
  5. Step 5: Solve for x
    x = 2,109,692.36/1,218.78
  6. Step 6: Final answer
    x = 1,730.99

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.