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Finding the Third Proportional to 1,157 and 2,435

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Solution

The third proportional to 1,157 and 2,435 is: 5,124.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157 : 2,435 = 2,435 : x
  2. Step 2: Convert to fraction form
    1,157/2,435 = 2,435/x
  3. Step 3: Cross multiply
    1,157x = 2,435 × 2,435
  4. Step 4: Simplify right side
    1,157x = 5,929,225
  5. Step 5: Solve for x
    x = 5,929,225/1,157
  6. Step 6: Final answer
    x = 5,124.65

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.