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Finding the Third Proportional to 430.50 and 516

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Solution

The third proportional to 430.50 and 516 is: 618.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.50 : 516 = 516 : x
  2. Step 2: Convert to fraction form
    430.50/516 = 516/x
  3. Step 3: Cross multiply
    430.50x = 516 × 516
  4. Step 4: Simplify right side
    430.50x = 266,256
  5. Step 5: Solve for x
    x = 266,256/430.50
  6. Step 6: Final answer
    x = 618.48

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Why These Related Problems?

These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.