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Finding the Third Proportional to 556.50 and 909

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Solution

The third proportional to 556.50 and 909 is: 1,484.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.50 : 909 = 909 : x
  2. Step 2: Convert to fraction form
    556.50/909 = 909/x
  3. Step 3: Cross multiply
    556.50x = 909 × 909
  4. Step 4: Simplify right side
    556.50x = 826,281
  5. Step 5: Solve for x
    x = 826,281/556.50
  6. Step 6: Final answer
    x = 1,484.78

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.