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Finding the Third Proportional to 522 and 1,140

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Solution

The third proportional to 522 and 1,140 is: 2,489.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    522 : 1,140 = 1,140 : x
  2. Step 2: Convert to fraction form
    522/1,140 = 1,140/x
  3. Step 3: Cross multiply
    522x = 1,140 × 1,140
  4. Step 4: Simplify right side
    522x = 1,299,600
  5. Step 5: Solve for x
    x = 1,299,600/522
  6. Step 6: Final answer
    x = 2,489.66

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.