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Finding the Fourth Proportional to 3,885.98, 5,819.65 and 2,128.34

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Solution

The fourth proportional to 3,885.98, 5,819.65 and 2,128.34 is: 3,187.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,885.98 : 5,819.65 = 2,128.34 : x
  2. Step 2: Convert to fraction form
    3,885.98/5,819.65 = 2,128.34/x
  3. Step 3: Cross multiply
    3,885.98x = 5,819.65 × 2,128.34
  4. Step 4: Simplify right side
    3,885.98x = 12,386,203.11
  5. Step 5: Solve for x
    x = 12,386,203.11/3,885.98
  6. Step 6: Final answer
    x = 3,187.41

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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.