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Finding the Fourth Proportional to 370.20, 557.30 and 319.98

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Solution

The fourth proportional to 370.20, 557.30 and 319.98 is: 481.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.20 : 557.30 = 319.98 : x
  2. Step 2: Convert to fraction form
    370.20/557.30 = 319.98/x
  3. Step 3: Cross multiply
    370.20x = 557.30 × 319.98
  4. Step 4: Simplify right side
    370.20x = 178,323.25
  5. Step 5: Solve for x
    x = 178,323.25/370.20
  6. Step 6: Final answer
    x = 481.69

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.