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Finding the Fourth Proportional to 5,660.80, 7,819.38 and 4,719.67

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Solution

The fourth proportional to 5,660.80, 7,819.38 and 4,719.67 is: 6,519.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,660.80 : 7,819.38 = 4,719.67 : x
  2. Step 2: Convert to fraction form
    5,660.80/7,819.38 = 4,719.67/x
  3. Step 3: Cross multiply
    5,660.80x = 7,819.38 × 4,719.67
  4. Step 4: Simplify right side
    5,660.80x = 36,904,893.20
  5. Step 5: Solve for x
    x = 36,904,893.20/5,660.80
  6. Step 6: Final answer
    x = 6,519.38

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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.