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Finding the Fourth Proportional to 205.46, 307.90 and 159.60

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Solution

The fourth proportional to 205.46, 307.90 and 159.60 is: 239.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.46 : 307.90 = 159.60 : x
  2. Step 2: Convert to fraction form
    205.46/307.90 = 159.60/x
  3. Step 3: Cross multiply
    205.46x = 307.90 × 159.60
  4. Step 4: Simplify right side
    205.46x = 49,140.84
  5. Step 5: Solve for x
    x = 49,140.84/205.46
  6. Step 6: Final answer
    x = 239.17

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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.