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Finding the Fourth Proportional to 5,378.61, 8,065.80 and 1,867.65

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Solution

The fourth proportional to 5,378.61, 8,065.80 and 1,867.65 is: 2,800.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,378.61 : 8,065.80 = 1,867.65 : x
  2. Step 2: Convert to fraction form
    5,378.61/8,065.80 = 1,867.65/x
  3. Step 3: Cross multiply
    5,378.61x = 8,065.80 × 1,867.65
  4. Step 4: Simplify right side
    5,378.61x = 15,064,091.37
  5. Step 5: Solve for x
    x = 15,064,091.37/5,378.61
  6. Step 6: Final answer
    x = 2,800.74

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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.