Home / 1,818.78-2,511.10-1,398.35

Finding the Fourth Proportional to 1,818.78, 2,511.10 and 1,398.35

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Solution

The fourth proportional to 1,818.78, 2,511.10 and 1,398.35 is: 1,930.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,818.78 : 2,511.10 = 1,398.35 : x
  2. Step 2: Convert to fraction form
    1,818.78/2,511.10 = 1,398.35/x
  3. Step 3: Cross multiply
    1,818.78x = 2,511.10 × 1,398.35
  4. Step 4: Simplify right side
    1,818.78x = 3,511,396.69
  5. Step 5: Solve for x
    x = 3,511,396.69/1,818.78
  6. Step 6: Final answer
    x = 1,930.64

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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.