Home / 1,929.39-2,662.80-1,143.30

Finding the Fourth Proportional to 1,929.39, 2,662.80 and 1,143.30

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Solution

The fourth proportional to 1,929.39, 2,662.80 and 1,143.30 is: 1,577.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.39 : 2,662.80 = 1,143.30 : x
  2. Step 2: Convert to fraction form
    1,929.39/2,662.80 = 1,143.30/x
  3. Step 3: Cross multiply
    1,929.39x = 2,662.80 × 1,143.30
  4. Step 4: Simplify right side
    1,929.39x = 3,044,379.24
  5. Step 5: Solve for x
    x = 3,044,379.24/1,929.39
  6. Step 6: Final answer
    x = 1,577.90

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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.