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Finding the Fourth Proportional to 2,120.02, 2,921.01 and 1,621.11

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Solution

The fourth proportional to 2,120.02, 2,921.01 and 1,621.11 is: 2,233.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.02 : 2,921.01 = 1,621.11 : x
  2. Step 2: Convert to fraction form
    2,120.02/2,921.01 = 1,621.11/x
  3. Step 3: Cross multiply
    2,120.02x = 2,921.01 × 1,621.11
  4. Step 4: Simplify right side
    2,120.02x = 4,735,292.51
  5. Step 5: Solve for x
    x = 4,735,292.51/2,120.02
  6. Step 6: Final answer
    x = 2,233.60

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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.