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Finding the Fourth Proportional to 240.90, 359.70 and 208.50

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Solution

The fourth proportional to 240.90, 359.70 and 208.50 is: 311.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.90 : 359.70 = 208.50 : x
  2. Step 2: Convert to fraction form
    240.90/359.70 = 208.50/x
  3. Step 3: Cross multiply
    240.90x = 359.70 × 208.50
  4. Step 4: Simplify right side
    240.90x = 74,997.45
  5. Step 5: Solve for x
    x = 74,997.45/240.90
  6. Step 6: Final answer
    x = 311.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.