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Finding the Fourth Proportional to 509.21, 702.70 and 276.33

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Solution

The fourth proportional to 509.21, 702.70 and 276.33 is: 381.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.21 : 702.70 = 276.33 : x
  2. Step 2: Convert to fraction form
    509.21/702.70 = 276.33/x
  3. Step 3: Cross multiply
    509.21x = 702.70 × 276.33
  4. Step 4: Simplify right side
    509.21x = 194,176.40
  5. Step 5: Solve for x
    x = 194,176.40/509.21
  6. Step 6: Final answer
    x = 381.33

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