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Finding the Third Proportional to 385.50 and 470

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Solution

The third proportional to 385.50 and 470 is: 573.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.50 : 470 = 470 : x
  2. Step 2: Convert to fraction form
    385.50/470 = 470/x
  3. Step 3: Cross multiply
    385.50x = 470 × 470
  4. Step 4: Simplify right side
    385.50x = 220,900
  5. Step 5: Solve for x
    x = 220,900/385.50
  6. Step 6: Final answer
    x = 573.02

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Why These Related Problems?

These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.