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Finding the Fourth Proportional to 2,990.02, 4,485.03 and 2,160.58

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Solution

The fourth proportional to 2,990.02, 4,485.03 and 2,160.58 is: 3,240.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.02 : 4,485.03 = 2,160.58 : x
  2. Step 2: Convert to fraction form
    2,990.02/4,485.03 = 2,160.58/x
  3. Step 3: Cross multiply
    2,990.02x = 4,485.03 × 2,160.58
  4. Step 4: Simplify right side
    2,990.02x = 9,690,246.80
  5. Step 5: Solve for x
    x = 9,690,246.80/2,990.02
  6. Step 6: Final answer
    x = 3,240.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.