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Finding the Fourth Proportional to 416, 623.45 and 300.83

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Solution

The fourth proportional to 416, 623.45 and 300.83 is: 450.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    416 : 623.45 = 300.83 : x
  2. Step 2: Convert to fraction form
    416/623.45 = 300.83/x
  3. Step 3: Cross multiply
    416x = 623.45 × 300.83
  4. Step 4: Simplify right side
    416x = 187,552.46
  5. Step 5: Solve for x
    x = 187,552.46/416
  6. Step 6: Final answer
    x = 450.85

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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.