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Finding the Fourth Proportional to 3,519, 5,278.57 and 1,328.76

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Solution

The fourth proportional to 3,519, 5,278.57 and 1,328.76 is: 1,993.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,519 : 5,278.57 = 1,328.76 : x
  2. Step 2: Convert to fraction form
    3,519/5,278.57 = 1,328.76/x
  3. Step 3: Cross multiply
    3,519x = 5,278.57 × 1,328.76
  4. Step 4: Simplify right side
    3,519x = 7,013,949.35
  5. Step 5: Solve for x
    x = 7,013,949.35/3,519
  6. Step 6: Final answer
    x = 1,993.17

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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.