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Finding the Fourth Proportional to 3,320.64, 4,979.10 and 1,539.79

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Solution

The fourth proportional to 3,320.64, 4,979.10 and 1,539.79 is: 2,308.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,320.64 : 4,979.10 = 1,539.79 : x
  2. Step 2: Convert to fraction form
    3,320.64/4,979.10 = 1,539.79/x
  3. Step 3: Cross multiply
    3,320.64x = 4,979.10 × 1,539.79
  4. Step 4: Simplify right side
    3,320.64x = 7,666,768.39
  5. Step 5: Solve for x
    x = 7,666,768.39/3,320.64
  6. Step 6: Final answer
    x = 2,308.82

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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.