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Finding the Fourth Proportional to 447.70, 617.85 and 270.70

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Solution

The fourth proportional to 447.70, 617.85 and 270.70 is: 373.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.70 : 617.85 = 270.70 : x
  2. Step 2: Convert to fraction form
    447.70/617.85 = 270.70/x
  3. Step 3: Cross multiply
    447.70x = 617.85 × 270.70
  4. Step 4: Simplify right side
    447.70x = 167,250.45
  5. Step 5: Solve for x
    x = 167,250.45/447.70
  6. Step 6: Final answer
    x = 373.58

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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.