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Finding the Fourth Proportional to 3,890.64, 5,821.35 and 2,422.92

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Solution

The fourth proportional to 3,890.64, 5,821.35 and 2,422.92 is: 3,625.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.64 : 5,821.35 = 2,422.92 : x
  2. Step 2: Convert to fraction form
    3,890.64/5,821.35 = 2,422.92/x
  3. Step 3: Cross multiply
    3,890.64x = 5,821.35 × 2,422.92
  4. Step 4: Simplify right side
    3,890.64x = 14,104,665.34
  5. Step 5: Solve for x
    x = 14,104,665.34/3,890.64
  6. Step 6: Final answer
    x = 3,625.28

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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.