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Finding the Fourth Proportional to 2,990.92, 4,127.16 and 1,664.52

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Solution

The fourth proportional to 2,990.92, 4,127.16 and 1,664.52 is: 2,296.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.92 : 4,127.16 = 1,664.52 : x
  2. Step 2: Convert to fraction form
    2,990.92/4,127.16 = 1,664.52/x
  3. Step 3: Cross multiply
    2,990.92x = 4,127.16 × 1,664.52
  4. Step 4: Simplify right side
    2,990.92x = 6,869,740.36
  5. Step 5: Solve for x
    x = 6,869,740.36/2,990.92
  6. Step 6: Final answer
    x = 2,296.87

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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.