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Finding the Third Proportional to 423 and 508.50

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Solution

The third proportional to 423 and 508.50 is: 611.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    423 : 508.50 = 508.50 : x
  2. Step 2: Convert to fraction form
    423/508.50 = 508.50/x
  3. Step 3: Cross multiply
    423x = 508.50 × 508.50
  4. Step 4: Simplify right side
    423x = 258,572.25
  5. Step 5: Solve for x
    x = 258,572.25/423
  6. Step 6: Final answer
    x = 611.28

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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.