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Finding the Fourth Proportional to 5,368.82, 7,408.87 and 2,978.71

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Solution

The fourth proportional to 5,368.82, 7,408.87 and 2,978.71 is: 4,110.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,368.82 : 7,408.87 = 2,978.71 : x
  2. Step 2: Convert to fraction form
    5,368.82/7,408.87 = 2,978.71/x
  3. Step 3: Cross multiply
    5,368.82x = 7,408.87 × 2,978.71
  4. Step 4: Simplify right side
    5,368.82x = 22,068,849.19
  5. Step 5: Solve for x
    x = 22,068,849.19/5,368.82
  6. Step 6: Final answer
    x = 4,110.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.