Home / 2,991.60-4,128.32-1,665.28

Finding the Fourth Proportional to 2,991.60, 4,128.32 and 1,665.28

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Solution

The fourth proportional to 2,991.60, 4,128.32 and 1,665.28 is: 2,298.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.60 : 4,128.32 = 1,665.28 : x
  2. Step 2: Convert to fraction form
    2,991.60/4,128.32 = 1,665.28/x
  3. Step 3: Cross multiply
    2,991.60x = 4,128.32 × 1,665.28
  4. Step 4: Simplify right side
    2,991.60x = 6,874,802.57
  5. Step 5: Solve for x
    x = 6,874,802.57/2,991.60
  6. Step 6: Final answer
    x = 2,298.04

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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.