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Finding the Fourth Proportional to 473.89, 653.85 and 305.54

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Solution

The fourth proportional to 473.89, 653.85 and 305.54 is: 421.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.89 : 653.85 = 305.54 : x
  2. Step 2: Convert to fraction form
    473.89/653.85 = 305.54/x
  3. Step 3: Cross multiply
    473.89x = 653.85 × 305.54
  4. Step 4: Simplify right side
    473.89x = 199,777.33
  5. Step 5: Solve for x
    x = 199,777.33/473.89
  6. Step 6: Final answer
    x = 421.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.