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Finding the Fourth Proportional to 350.49, 525.80 and 145.09

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Solution

The fourth proportional to 350.49, 525.80 and 145.09 is: 217.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    350.49 : 525.80 = 145.09 : x
  2. Step 2: Convert to fraction form
    350.49/525.80 = 145.09/x
  3. Step 3: Cross multiply
    350.49x = 525.80 × 145.09
  4. Step 4: Simplify right side
    350.49x = 76,287.37
  5. Step 5: Solve for x
    x = 76,287.37/350.49
  6. Step 6: Final answer
    x = 217.66

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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.