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Finding the Fourth Proportional to 4,721, 6,516.60 and 2,858

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Solution

The fourth proportional to 4,721, 6,516.60 and 2,858 is: 3,945.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,721 : 6,516.60 = 2,858 : x
  2. Step 2: Convert to fraction form
    4,721/6,516.60 = 2,858/x
  3. Step 3: Cross multiply
    4,721x = 6,516.60 × 2,858
  4. Step 4: Simplify right side
    4,721x = 18,624,442.80
  5. Step 5: Solve for x
    x = 18,624,442.80/4,721
  6. Step 6: Final answer
    x = 3,945.02

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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.