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Finding the Fourth Proportional to 3,885.95, 5,828.10 and 1,111.88

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Solution

The fourth proportional to 3,885.95, 5,828.10 and 1,111.88 is: 1,667.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,885.95 : 5,828.10 = 1,111.88 : x
  2. Step 2: Convert to fraction form
    3,885.95/5,828.10 = 1,111.88/x
  3. Step 3: Cross multiply
    3,885.95x = 5,828.10 × 1,111.88
  4. Step 4: Simplify right side
    3,885.95x = 6,480,147.83
  5. Step 5: Solve for x
    x = 6,480,147.83/3,885.95
  6. Step 6: Final answer
    x = 1,667.58

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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.