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Finding the Fourth Proportional to 306.54, 459.09 and 258.30

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Solution

The fourth proportional to 306.54, 459.09 and 258.30 is: 386.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.54 : 459.09 = 258.30 : x
  2. Step 2: Convert to fraction form
    306.54/459.09 = 258.30/x
  3. Step 3: Cross multiply
    306.54x = 459.09 × 258.30
  4. Step 4: Simplify right side
    306.54x = 118,582.95
  5. Step 5: Solve for x
    x = 118,582.95/306.54
  6. Step 6: Final answer
    x = 386.84

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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.