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Finding the Third Proportional to 1,915 and 2,910

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Solution

The third proportional to 1,915 and 2,910 is: 4,421.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915 : 2,910 = 2,910 : x
  2. Step 2: Convert to fraction form
    1,915/2,910 = 2,910/x
  3. Step 3: Cross multiply
    1,915x = 2,910 × 2,910
  4. Step 4: Simplify right side
    1,915x = 8,468,100
  5. Step 5: Solve for x
    x = 8,468,100/1,915
  6. Step 6: Final answer
    x = 4,421.98

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.