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Finding the Third Proportional to 2,490 and 4,423.50

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Solution

The third proportional to 2,490 and 4,423.50 is: 7,858.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,490 : 4,423.50 = 4,423.50 : x
  2. Step 2: Convert to fraction form
    2,490/4,423.50 = 4,423.50/x
  3. Step 3: Cross multiply
    2,490x = 4,423.50 × 4,423.50
  4. Step 4: Simplify right side
    2,490x = 19,567,352.25
  5. Step 5: Solve for x
    x = 19,567,352.25/2,490
  6. Step 6: Final answer
    x = 7,858.37

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Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.