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Finding the Fourth Proportional to 2,990.57, 4,127.05 and 1,664.25

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Solution

The fourth proportional to 2,990.57, 4,127.05 and 1,664.25 is: 2,296.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.57 : 4,127.05 = 1,664.25 : x
  2. Step 2: Convert to fraction form
    2,990.57/4,127.05 = 1,664.25/x
  3. Step 3: Cross multiply
    2,990.57x = 4,127.05 × 1,664.25
  4. Step 4: Simplify right side
    2,990.57x = 6,868,429.57
  5. Step 5: Solve for x
    x = 6,868,429.57/2,990.57
  6. Step 6: Final answer
    x = 2,296.70

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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.