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Finding the Fourth Proportional to 353.93, 488.04 and 306.89

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Solution

The fourth proportional to 353.93, 488.04 and 306.89 is: 423.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.93 : 488.04 = 306.89 : x
  2. Step 2: Convert to fraction form
    353.93/488.04 = 306.89/x
  3. Step 3: Cross multiply
    353.93x = 488.04 × 306.89
  4. Step 4: Simplify right side
    353.93x = 149,775.82
  5. Step 5: Solve for x
    x = 149,775.82/353.93
  6. Step 6: Final answer
    x = 423.18

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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.