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Finding the Fourth Proportional to 370.76, 511.56 and 239.74

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Solution

The fourth proportional to 370.76, 511.56 and 239.74 is: 330.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.76 : 511.56 = 239.74 : x
  2. Step 2: Convert to fraction form
    370.76/511.56 = 239.74/x
  3. Step 3: Cross multiply
    370.76x = 511.56 × 239.74
  4. Step 4: Simplify right side
    370.76x = 122,642.67
  5. Step 5: Solve for x
    x = 122,642.67/370.76
  6. Step 6: Final answer
    x = 330.79

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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.