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Finding the Fourth Proportional to 394.51, 591.79 and 307.68

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Solution

The fourth proportional to 394.51, 591.79 and 307.68 is: 461.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.51 : 591.79 = 307.68 : x
  2. Step 2: Convert to fraction form
    394.51/591.79 = 307.68/x
  3. Step 3: Cross multiply
    394.51x = 591.79 × 307.68
  4. Step 4: Simplify right side
    394.51x = 182,080.11
  5. Step 5: Solve for x
    x = 182,080.11/394.51
  6. Step 6: Final answer
    x = 461.53

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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.