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Finding the Fourth Proportional to 366.06, 505.12 and 208.70

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Solution

The fourth proportional to 366.06, 505.12 and 208.70 is: 287.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    366.06 : 505.12 = 208.70 : x
  2. Step 2: Convert to fraction form
    366.06/505.12 = 208.70/x
  3. Step 3: Cross multiply
    366.06x = 505.12 × 208.70
  4. Step 4: Simplify right side
    366.06x = 105,416.02
  5. Step 5: Solve for x
    x = 105,416.02/366.06
  6. Step 6: Final answer
    x = 287.98

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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.