Home / 2,991.15-4,128.17-1,665.45

Finding the Fourth Proportional to 2,991.15, 4,128.17 and 1,665.45

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Solution

The fourth proportional to 2,991.15, 4,128.17 and 1,665.45 is: 2,298.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.15 : 4,128.17 = 1,665.45 : x
  2. Step 2: Convert to fraction form
    2,991.15/4,128.17 = 1,665.45/x
  3. Step 3: Cross multiply
    2,991.15x = 4,128.17 × 1,665.45
  4. Step 4: Simplify right side
    2,991.15x = 6,875,252.40
  5. Step 5: Solve for x
    x = 6,875,252.40/2,991.15
  6. Step 6: Final answer
    x = 2,298.53

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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.