Home / 1,929.92-2,662.40-1,143.36

Finding the Fourth Proportional to 1,929.92, 2,662.40 and 1,143.36

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Solution

The fourth proportional to 1,929.92, 2,662.40 and 1,143.36 is: 1,577.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.92 : 2,662.40 = 1,143.36 : x
  2. Step 2: Convert to fraction form
    1,929.92/2,662.40 = 1,143.36/x
  3. Step 3: Cross multiply
    1,929.92x = 2,662.40 × 1,143.36
  4. Step 4: Simplify right side
    1,929.92x = 3,044,081.66
  5. Step 5: Solve for x
    x = 3,044,081.66/1,929.92
  6. Step 6: Final answer
    x = 1,577.31

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1.5x scale

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.