Home / 2,991.16-4,129.65-1,929.44

Finding the Fourth Proportional to 2,991.16, 4,129.65 and 1,929.44

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Solution

The fourth proportional to 2,991.16, 4,129.65 and 1,929.44 is: 2,663.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.16 : 4,129.65 = 1,929.44 : x
  2. Step 2: Convert to fraction form
    2,991.16/4,129.65 = 1,929.44/x
  3. Step 3: Cross multiply
    2,991.16x = 4,129.65 × 1,929.44
  4. Step 4: Simplify right side
    2,991.16x = 7,967,911.90
  5. Step 5: Solve for x
    x = 7,967,911.90/2,991.16
  6. Step 6: Final answer
    x = 2,663.82

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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.