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Finding the Fourth Proportional to 5,368.11, 7,408.41 and 2,978.30

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Solution

The fourth proportional to 5,368.11, 7,408.41 and 2,978.30 is: 4,110.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,368.11 : 7,408.41 = 2,978.30 : x
  2. Step 2: Convert to fraction form
    5,368.11/7,408.41 = 2,978.30/x
  3. Step 3: Cross multiply
    5,368.11x = 7,408.41 × 2,978.30
  4. Step 4: Simplify right side
    5,368.11x = 22,064,430.46
  5. Step 5: Solve for x
    x = 22,064,430.46/5,368.11
  6. Step 6: Final answer
    x = 4,110.28

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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.