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Finding the Fourth Proportional to 3,493.62, 4,821.21 and 1,921.77

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Solution

The fourth proportional to 3,493.62, 4,821.21 and 1,921.77 is: 2,652.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,493.62 : 4,821.21 = 1,921.77 : x
  2. Step 2: Convert to fraction form
    3,493.62/4,821.21 = 1,921.77/x
  3. Step 3: Cross multiply
    3,493.62x = 4,821.21 × 1,921.77
  4. Step 4: Simplify right side
    3,493.62x = 9,265,256.74
  5. Step 5: Solve for x
    x = 9,265,256.74/3,493.62
  6. Step 6: Final answer
    x = 2,652.05

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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.