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Finding the Fourth Proportional to 2,009.90, 3,015.30 and 623.30

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Solution

The fourth proportional to 2,009.90, 3,015.30 and 623.30 is: 935.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,009.90 : 3,015.30 = 623.30 : x
  2. Step 2: Convert to fraction form
    2,009.90/3,015.30 = 623.30/x
  3. Step 3: Cross multiply
    2,009.90x = 3,015.30 × 623.30
  4. Step 4: Simplify right side
    2,009.90x = 1,879,436.49
  5. Step 5: Solve for x
    x = 1,879,436.49/2,009.90
  6. Step 6: Final answer
    x = 935.09

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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.