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Finding the Fourth Proportional to 350.79, 525.80 and 145.31

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Solution

The fourth proportional to 350.79, 525.80 and 145.31 is: 217.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    350.79 : 525.80 = 145.31 : x
  2. Step 2: Convert to fraction form
    350.79/525.80 = 145.31/x
  3. Step 3: Cross multiply
    350.79x = 525.80 × 145.31
  4. Step 4: Simplify right side
    350.79x = 76,400.64
  5. Step 5: Solve for x
    x = 76,400.64/350.79
  6. Step 6: Final answer
    x = 217.80

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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.