Home / 1,929.78-2,663.14-1,143.68

Finding the Fourth Proportional to 1,929.78, 2,663.14 and 1,143.68

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Solution

The fourth proportional to 1,929.78, 2,663.14 and 1,143.68 is: 1,578.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.78 : 2,663.14 = 1,143.68 : x
  2. Step 2: Convert to fraction form
    1,929.78/2,663.14 = 1,143.68/x
  3. Step 3: Cross multiply
    1,929.78x = 2,663.14 × 1,143.68
  4. Step 4: Simplify right side
    1,929.78x = 3,045,779.96
  5. Step 5: Solve for x
    x = 3,045,779.96/1,929.78
  6. Step 6: Final answer
    x = 1,578.30

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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.