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Finding the Fourth Proportional to 431.98, 596.21 and 299.40

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Solution

The fourth proportional to 431.98, 596.21 and 299.40 is: 413.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.98 : 596.21 = 299.40 : x
  2. Step 2: Convert to fraction form
    431.98/596.21 = 299.40/x
  3. Step 3: Cross multiply
    431.98x = 596.21 × 299.40
  4. Step 4: Simplify right side
    431.98x = 178,503.23
  5. Step 5: Solve for x
    x = 178,503.23/431.98
  6. Step 6: Final answer
    x = 413.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.