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Finding the Fourth Proportional to 372.39, 513.87 and 215.00

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Solution

The fourth proportional to 372.39, 513.87 and 215.00 is: 296.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.39 : 513.87 = 215.00 : x
  2. Step 2: Convert to fraction form
    372.39/513.87 = 215.00/x
  3. Step 3: Cross multiply
    372.39x = 513.87 × 215.00
  4. Step 4: Simplify right side
    372.39x = 110,478.41
  5. Step 5: Solve for x
    x = 110,478.41/372.39
  6. Step 6: Final answer
    x = 296.67

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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.