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Finding the Fourth Proportional to 3,943.65, 5,528.40 and 3,943.65

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Solution

The fourth proportional to 3,943.65, 5,528.40 and 3,943.65 is: 5,528.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,943.65 : 5,528.40 = 3,943.65 : x
  2. Step 2: Convert to fraction form
    3,943.65/5,528.40 = 3,943.65/x
  3. Step 3: Cross multiply
    3,943.65x = 5,528.40 × 3,943.65
  4. Step 4: Simplify right side
    3,943.65x = 21,802,074.66
  5. Step 5: Solve for x
    x = 21,802,074.66/3,943.65
  6. Step 6: Final answer
    x = 5,528.40

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.