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Finding the Fourth Proportional to 5,443.38, 8,161.98 and 4,978.98

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Solution

The fourth proportional to 5,443.38, 8,161.98 and 4,978.98 is: 7,465.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,443.38 : 8,161.98 = 4,978.98 : x
  2. Step 2: Convert to fraction form
    5,443.38/8,161.98 = 4,978.98/x
  3. Step 3: Cross multiply
    5,443.38x = 8,161.98 × 4,978.98
  4. Step 4: Simplify right side
    5,443.38x = 40,638,335.18
  5. Step 5: Solve for x
    x = 40,638,335.18/5,443.38
  6. Step 6: Final answer
    x = 7,465.64

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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.