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Finding the Fourth Proportional to 3,258.90, 4,889.79 and 1,314.90

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Solution

The fourth proportional to 3,258.90, 4,889.79 and 1,314.90 is: 1,972.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,258.90 : 4,889.79 = 1,314.90 : x
  2. Step 2: Convert to fraction form
    3,258.90/4,889.79 = 1,314.90/x
  3. Step 3: Cross multiply
    3,258.90x = 4,889.79 × 1,314.90
  4. Step 4: Simplify right side
    3,258.90x = 6,429,584.87
  5. Step 5: Solve for x
    x = 6,429,584.87/3,258.90
  6. Step 6: Final answer
    x = 1,972.93

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1.5x scale

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.