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Finding the Fourth Proportional to 431.83, 644.82 and 375.94

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Solution

The fourth proportional to 431.83, 644.82 and 375.94 is: 561.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.83 : 644.82 = 375.94 : x
  2. Step 2: Convert to fraction form
    431.83/644.82 = 375.94/x
  3. Step 3: Cross multiply
    431.83x = 644.82 × 375.94
  4. Step 4: Simplify right side
    431.83x = 242,413.63
  5. Step 5: Solve for x
    x = 242,413.63/431.83
  6. Step 6: Final answer
    x = 561.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.