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Finding the Fourth Proportional to 619.70, 930.15 and 376.70

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Solution

The fourth proportional to 619.70, 930.15 and 376.70 is: 565.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.70 : 930.15 = 376.70 : x
  2. Step 2: Convert to fraction form
    619.70/930.15 = 376.70/x
  3. Step 3: Cross multiply
    619.70x = 930.15 × 376.70
  4. Step 4: Simplify right side
    619.70x = 350,382.85
  5. Step 5: Solve for x
    x = 350,382.85/619.70
  6. Step 6: Final answer
    x = 565.41

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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.