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Finding the Fourth Proportional to 3,516.39, 5,274.48 and 919.32

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Solution

The fourth proportional to 3,516.39, 5,274.48 and 919.32 is: 1,378.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,516.39 : 5,274.48 = 919.32 : x
  2. Step 2: Convert to fraction form
    3,516.39/5,274.48 = 919.32/x
  3. Step 3: Cross multiply
    3,516.39x = 5,274.48 × 919.32
  4. Step 4: Simplify right side
    3,516.39x = 4,848,934.95
  5. Step 5: Solve for x
    x = 4,848,934.95/3,516.39
  6. Step 6: Final answer
    x = 1,378.95

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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.