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Finding the Fourth Proportional to 3,339.82, 5,009.74 and 1,392

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Solution

The fourth proportional to 3,339.82, 5,009.74 and 1,392 is: 2,088.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,339.82 : 5,009.74 = 1,392 : x
  2. Step 2: Convert to fraction form
    3,339.82/5,009.74 = 1,392/x
  3. Step 3: Cross multiply
    3,339.82x = 5,009.74 × 1,392
  4. Step 4: Simplify right side
    3,339.82x = 6,973,558.08
  5. Step 5: Solve for x
    x = 6,973,558.08/3,339.82
  6. Step 6: Final answer
    x = 2,088.00

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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.