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Finding the Fourth Proportional to 3,885.42, 5,826.70 and 1,419.51

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Solution

The fourth proportional to 3,885.42, 5,826.70 and 1,419.51 is: 2,128.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,885.42 : 5,826.70 = 1,419.51 : x
  2. Step 2: Convert to fraction form
    3,885.42/5,826.70 = 1,419.51/x
  3. Step 3: Cross multiply
    3,885.42x = 5,826.70 × 1,419.51
  4. Step 4: Simplify right side
    3,885.42x = 8,271,058.92
  5. Step 5: Solve for x
    x = 8,271,058.92/3,885.42
  6. Step 6: Final answer
    x = 2,128.74

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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.