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Finding the Fourth Proportional to 624.24, 936.36 and 407.94

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Solution

The fourth proportional to 624.24, 936.36 and 407.94 is: 611.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.24 : 936.36 = 407.94 : x
  2. Step 2: Convert to fraction form
    624.24/936.36 = 407.94/x
  3. Step 3: Cross multiply
    624.24x = 936.36 × 407.94
  4. Step 4: Simplify right side
    624.24x = 381,978.70
  5. Step 5: Solve for x
    x = 381,978.70/624.24
  6. Step 6: Final answer
    x = 611.91

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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.