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Finding the Fourth Proportional to 4,920.90, 7,365.15 and 3,819.30

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Solution

The fourth proportional to 4,920.90, 7,365.15 and 3,819.30 is: 5,716.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,920.90 : 7,365.15 = 3,819.30 : x
  2. Step 2: Convert to fraction form
    4,920.90/7,365.15 = 3,819.30/x
  3. Step 3: Cross multiply
    4,920.90x = 7,365.15 × 3,819.30
  4. Step 4: Simplify right side
    4,920.90x = 28,129,717.40
  5. Step 5: Solve for x
    x = 28,129,717.40/4,920.90
  6. Step 6: Final answer
    x = 5,716.38

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1.5x scale

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.