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Finding the Fourth Proportional to 3,031.56, 4,546.83 and 840.51

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Solution

The fourth proportional to 3,031.56, 4,546.83 and 840.51 is: 1,260.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,031.56 : 4,546.83 = 840.51 : x
  2. Step 2: Convert to fraction form
    3,031.56/4,546.83 = 840.51/x
  3. Step 3: Cross multiply
    3,031.56x = 4,546.83 × 840.51
  4. Step 4: Simplify right side
    3,031.56x = 3,821,656.08
  5. Step 5: Solve for x
    x = 3,821,656.08/3,031.56
  6. Step 6: Final answer
    x = 1,260.62

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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.