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Finding the Fourth Proportional to 3,519.64, 5,279.05 and 922.78

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Solution

The fourth proportional to 3,519.64, 5,279.05 and 922.78 is: 1,384.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,519.64 : 5,279.05 = 922.78 : x
  2. Step 2: Convert to fraction form
    3,519.64/5,279.05 = 922.78/x
  3. Step 3: Cross multiply
    3,519.64x = 5,279.05 × 922.78
  4. Step 4: Simplify right side
    3,519.64x = 4,871,401.76
  5. Step 5: Solve for x
    x = 4,871,401.76/3,519.64
  6. Step 6: Final answer
    x = 1,384.06

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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.