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Finding the Fourth Proportional to 5,382.93, 8,076 and 1,685.55

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Solution

The fourth proportional to 5,382.93, 8,076 and 1,685.55 is: 2,528.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,382.93 : 8,076 = 1,685.55 : x
  2. Step 2: Convert to fraction form
    5,382.93/8,076 = 1,685.55/x
  3. Step 3: Cross multiply
    5,382.93x = 8,076 × 1,685.55
  4. Step 4: Simplify right side
    5,382.93x = 13,612,501.80
  5. Step 5: Solve for x
    x = 13,612,501.80/5,382.93
  6. Step 6: Final answer
    x = 2,528.83

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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.