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Finding the Fourth Proportional to 3,239.58, 4,470.38 and 1,913.03

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Solution

The fourth proportional to 3,239.58, 4,470.38 and 1,913.03 is: 2,639.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,239.58 : 4,470.38 = 1,913.03 : x
  2. Step 2: Convert to fraction form
    3,239.58/4,470.38 = 1,913.03/x
  3. Step 3: Cross multiply
    3,239.58x = 4,470.38 × 1,913.03
  4. Step 4: Simplify right side
    3,239.58x = 8,551,971.05
  5. Step 5: Solve for x
    x = 8,551,971.05/3,239.58
  6. Step 6: Final answer
    x = 2,639.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.