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Finding the Fourth Proportional to 2,011.23, 3,015.84 and 840.89

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Solution

The fourth proportional to 2,011.23, 3,015.84 and 840.89 is: 1,260.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,011.23 : 3,015.84 = 840.89 : x
  2. Step 2: Convert to fraction form
    2,011.23/3,015.84 = 840.89/x
  3. Step 3: Cross multiply
    2,011.23x = 3,015.84 × 840.89
  4. Step 4: Simplify right side
    2,011.23x = 2,535,974.62
  5. Step 5: Solve for x
    x = 2,535,974.62/2,011.23
  6. Step 6: Final answer
    x = 1,260.91

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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.