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Finding the Fourth Proportional to 370.65, 511.32 and 239.70

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Solution

The fourth proportional to 370.65, 511.32 and 239.70 is: 330.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.65 : 511.32 = 239.70 : x
  2. Step 2: Convert to fraction form
    370.65/511.32 = 239.70/x
  3. Step 3: Cross multiply
    370.65x = 511.32 × 239.70
  4. Step 4: Simplify right side
    370.65x = 122,560.85
  5. Step 5: Solve for x
    x = 122,560.85/370.65
  6. Step 6: Final answer
    x = 330.67

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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.