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Finding the Fourth Proportional to 3,865.65, 5,326.86 and 3,384.64

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Solution

The fourth proportional to 3,865.65, 5,326.86 and 3,384.64 is: 4,664.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,865.65 : 5,326.86 = 3,384.64 : x
  2. Step 2: Convert to fraction form
    3,865.65/5,326.86 = 3,384.64/x
  3. Step 3: Cross multiply
    3,865.65x = 5,326.86 × 3,384.64
  4. Step 4: Simplify right side
    3,865.65x = 18,029,503.43
  5. Step 5: Solve for x
    x = 18,029,503.43/3,865.65
  6. Step 6: Final answer
    x = 4,664.03

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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.