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Finding the Fourth Proportional to 3,379.76, 5,070.05 and 1,299.28

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Solution

The fourth proportional to 3,379.76, 5,070.05 and 1,299.28 is: 1,949.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,379.76 : 5,070.05 = 1,299.28 : x
  2. Step 2: Convert to fraction form
    3,379.76/5,070.05 = 1,299.28/x
  3. Step 3: Cross multiply
    3,379.76x = 5,070.05 × 1,299.28
  4. Step 4: Simplify right side
    3,379.76x = 6,587,408.07
  5. Step 5: Solve for x
    x = 6,587,408.07/3,379.76
  6. Step 6: Final answer
    x = 1,949.08

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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.