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Finding the Fourth Proportional to 537.39, 805.95 and 213

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Solution

The fourth proportional to 537.39, 805.95 and 213 is: 319.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    537.39 : 805.95 = 213 : x
  2. Step 2: Convert to fraction form
    537.39/805.95 = 213/x
  3. Step 3: Cross multiply
    537.39x = 805.95 × 213
  4. Step 4: Simplify right side
    537.39x = 171,667.35
  5. Step 5: Solve for x
    x = 171,667.35/537.39
  6. Step 6: Final answer
    x = 319.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.