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Finding the Fourth Proportional to 370.21, 510.92 and 239.60

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Solution

The fourth proportional to 370.21, 510.92 and 239.60 is: 330.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.21 : 510.92 = 239.60 : x
  2. Step 2: Convert to fraction form
    370.21/510.92 = 239.60/x
  3. Step 3: Cross multiply
    370.21x = 510.92 × 239.60
  4. Step 4: Simplify right side
    370.21x = 122,417.35
  5. Step 5: Solve for x
    x = 122,417.35/370.21
  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.