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Finding the Fourth Proportional to 509.22, 702.90 and 299.39

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Solution

The fourth proportional to 509.22, 702.90 and 299.39 is: 413.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.22 : 702.90 = 299.39 : x
  2. Step 2: Convert to fraction form
    509.22/702.90 = 299.39/x
  3. Step 3: Cross multiply
    509.22x = 702.90 × 299.39
  4. Step 4: Simplify right side
    509.22x = 210,440.12
  5. Step 5: Solve for x
    x = 210,440.12/509.22
  6. Step 6: Final answer
    x = 413.26

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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.