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Finding the Fourth Proportional to 3,493.56, 4,821.30 and 1,921.80

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Solution

The fourth proportional to 3,493.56, 4,821.30 and 1,921.80 is: 2,652.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,493.56 : 4,821.30 = 1,921.80 : x
  2. Step 2: Convert to fraction form
    3,493.56/4,821.30 = 1,921.80/x
  3. Step 3: Cross multiply
    3,493.56x = 4,821.30 × 1,921.80
  4. Step 4: Simplify right side
    3,493.56x = 9,265,574.34
  5. Step 5: Solve for x
    x = 9,265,574.34/3,493.56
  6. Step 6: Final answer
    x = 2,652.19

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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.