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Finding the Fourth Proportional to 4,889, 7,324.38 and 2,421

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Solution

The fourth proportional to 4,889, 7,324.38 and 2,421 is: 3,626.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,889 : 7,324.38 = 2,421 : x
  2. Step 2: Convert to fraction form
    4,889/7,324.38 = 2,421/x
  3. Step 3: Cross multiply
    4,889x = 7,324.38 × 2,421
  4. Step 4: Simplify right side
    4,889x = 17,732,323.98
  5. Step 5: Solve for x
    x = 17,732,323.98/4,889
  6. Step 6: Final answer
    x = 3,626.98

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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.