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Finding the Fourth Proportional to 524.15, 786.28 and 215.95

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Solution

The fourth proportional to 524.15, 786.28 and 215.95 is: 323.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.15 : 786.28 = 215.95 : x
  2. Step 2: Convert to fraction form
    524.15/786.28 = 215.95/x
  3. Step 3: Cross multiply
    524.15x = 786.28 × 215.95
  4. Step 4: Simplify right side
    524.15x = 169,794.66
  5. Step 5: Solve for x
    x = 169,794.66/524.15
  6. Step 6: Final answer
    x = 323.94

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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.