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Finding the Fourth Proportional to 419, 628.77 and 162.50

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Solution

The fourth proportional to 419, 628.77 and 162.50 is: 243.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    419 : 628.77 = 162.50 : x
  2. Step 2: Convert to fraction form
    419/628.77 = 162.50/x
  3. Step 3: Cross multiply
    419x = 628.77 × 162.50
  4. Step 4: Simplify right side
    419x = 102,175.13
  5. Step 5: Solve for x
    x = 102,175.13/419
  6. Step 6: Final answer
    x = 243.85

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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.