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Finding the Fourth Proportional to 3,484.92, 4,809.21 and 1,912.98

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Solution

The fourth proportional to 3,484.92, 4,809.21 and 1,912.98 is: 2,639.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,484.92 : 4,809.21 = 1,912.98 : x
  2. Step 2: Convert to fraction form
    3,484.92/4,809.21 = 1,912.98/x
  3. Step 3: Cross multiply
    3,484.92x = 4,809.21 × 1,912.98
  4. Step 4: Simplify right side
    3,484.92x = 9,199,922.55
  5. Step 5: Solve for x
    x = 9,199,922.55/3,484.92
  6. Step 6: Final answer
    x = 2,639.92

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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.