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Finding the Fourth Proportional to 419.55, 628.65 and 350.70

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Solution

The fourth proportional to 419.55, 628.65 and 350.70 is: 525.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.55 : 628.65 = 350.70 : x
  2. Step 2: Convert to fraction form
    419.55/628.65 = 350.70/x
  3. Step 3: Cross multiply
    419.55x = 628.65 × 350.70
  4. Step 4: Simplify right side
    419.55x = 220,467.56
  5. Step 5: Solve for x
    x = 220,467.56/419.55
  6. Step 6: Final answer
    x = 525.49

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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.