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Finding the Fourth Proportional to 571.93, 789.27 and 309.95

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Solution

The fourth proportional to 571.93, 789.27 and 309.95 is: 427.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.93 : 789.27 = 309.95 : x
  2. Step 2: Convert to fraction form
    571.93/789.27 = 309.95/x
  3. Step 3: Cross multiply
    571.93x = 789.27 × 309.95
  4. Step 4: Simplify right side
    571.93x = 244,628.74
  5. Step 5: Solve for x
    x = 244,628.74/571.93
  6. Step 6: Final answer
    x = 427.72

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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.