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Finding the Fourth Proportional to 3,287.86, 4,930.58 and 1,339

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Solution

The fourth proportional to 3,287.86, 4,930.58 and 1,339 is: 2,008.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,287.86 : 4,930.58 = 1,339 : x
  2. Step 2: Convert to fraction form
    3,287.86/4,930.58 = 1,339/x
  3. Step 3: Cross multiply
    3,287.86x = 4,930.58 × 1,339
  4. Step 4: Simplify right side
    3,287.86x = 6,602,039.93
  5. Step 5: Solve for x
    x = 6,602,039.93/3,287.86
  6. Step 6: Final answer
    x = 2,008.01

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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.