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Finding the Fourth Proportional to 473.75, 653.74 and 274.45

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Solution

The fourth proportional to 473.75, 653.74 and 274.45 is: 378.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.75 : 653.74 = 274.45 : x
  2. Step 2: Convert to fraction form
    473.75/653.74 = 274.45/x
  3. Step 3: Cross multiply
    473.75x = 653.74 × 274.45
  4. Step 4: Simplify right side
    473.75x = 179,416.62
  5. Step 5: Solve for x
    x = 179,416.62/473.75
  6. Step 6: Final answer
    x = 378.71

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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.