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Finding the Third Proportional to 857.50 and 1,853

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Solution

The third proportional to 857.50 and 1,853 is: 4,004.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.50 : 1,853 = 1,853 : x
  2. Step 2: Convert to fraction form
    857.50/1,853 = 1,853/x
  3. Step 3: Cross multiply
    857.50x = 1,853 × 1,853
  4. Step 4: Simplify right side
    857.50x = 3,433,609
  5. Step 5: Solve for x
    x = 3,433,609/857.50
  6. Step 6: Final answer
    x = 4,004.21

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.