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Finding the Fourth Proportional to 656.95, 985.47 and 194.80

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Solution

The fourth proportional to 656.95, 985.47 and 194.80 is: 292.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.95 : 985.47 = 194.80 : x
  2. Step 2: Convert to fraction form
    656.95/985.47 = 194.80/x
  3. Step 3: Cross multiply
    656.95x = 985.47 × 194.80
  4. Step 4: Simplify right side
    656.95x = 191,969.56
  5. Step 5: Solve for x
    x = 191,969.56/656.95
  6. Step 6: Final answer
    x = 292.21

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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.