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Finding the Third Proportional to 318.75 and 573.38

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Solution

The third proportional to 318.75 and 573.38 is: 1,031.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.75 : 573.38 = 573.38 : x
  2. Step 2: Convert to fraction form
    318.75/573.38 = 573.38/x
  3. Step 3: Cross multiply
    318.75x = 573.38 × 573.38
  4. Step 4: Simplify right side
    318.75x = 328,758.89
  5. Step 5: Solve for x
    x = 328,758.89/318.75
  6. Step 6: Final answer
    x = 1,031.40

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Why These Related Problems?

These problems maintain the same ratio (1.80) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.