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Finding the Fourth Proportional to 350.71, 525.45 and 285.70

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Solution

The fourth proportional to 350.71, 525.45 and 285.70 is: 428.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    350.71 : 525.45 = 285.70 : x
  2. Step 2: Convert to fraction form
    350.71/525.45 = 285.70/x
  3. Step 3: Cross multiply
    350.71x = 525.45 × 285.70
  4. Step 4: Simplify right side
    350.71x = 150,121.07
  5. Step 5: Solve for x
    x = 150,121.07/350.71
  6. Step 6: Final answer
    x = 428.05

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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.