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Finding the Fourth Proportional to 3,888.61, 5,833.22 and 1,389.96

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Solution

The fourth proportional to 3,888.61, 5,833.22 and 1,389.96 is: 2,085.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.61 : 5,833.22 = 1,389.96 : x
  2. Step 2: Convert to fraction form
    3,888.61/5,833.22 = 1,389.96/x
  3. Step 3: Cross multiply
    3,888.61x = 5,833.22 × 1,389.96
  4. Step 4: Simplify right side
    3,888.61x = 8,107,935.52
  5. Step 5: Solve for x
    x = 8,107,935.52/3,888.61
  6. Step 6: Final answer
    x = 2,085.05

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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.