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Finding the Third Proportional to 712 and 1,558

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Solution

The third proportional to 712 and 1,558 is: 3,409.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    712 : 1,558 = 1,558 : x
  2. Step 2: Convert to fraction form
    712/1,558 = 1,558/x
  3. Step 3: Cross multiply
    712x = 1,558 × 1,558
  4. Step 4: Simplify right side
    712x = 2,427,364
  5. Step 5: Solve for x
    x = 2,427,364/712
  6. Step 6: Final answer
    x = 3,409.22

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.