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Finding the Third Proportional to 558.50 and 869.75

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Solution

The third proportional to 558.50 and 869.75 is: 1,354.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.50 : 869.75 = 869.75 : x
  2. Step 2: Convert to fraction form
    558.50/869.75 = 869.75/x
  3. Step 3: Cross multiply
    558.50x = 869.75 × 869.75
  4. Step 4: Simplify right side
    558.50x = 756,465.06
  5. Step 5: Solve for x
    x = 756,465.06/558.50
  6. Step 6: Final answer
    x = 1,354.46

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.