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Finding the Fourth Proportional to 3,953.54, 5,928.30 and 1,320.10

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Solution

The fourth proportional to 3,953.54, 5,928.30 and 1,320.10 is: 1,979.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,953.54 : 5,928.30 = 1,320.10 : x
  2. Step 2: Convert to fraction form
    3,953.54/5,928.30 = 1,320.10/x
  3. Step 3: Cross multiply
    3,953.54x = 5,928.30 × 1,320.10
  4. Step 4: Simplify right side
    3,953.54x = 7,825,929.06
  5. Step 5: Solve for x
    x = 7,825,929.06/3,953.54
  6. Step 6: Final answer
    x = 1,979.47

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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.