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Finding the Fourth Proportional to 619.99, 930.07 and 209.03

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Solution

The fourth proportional to 619.99, 930.07 and 209.03 is: 313.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.99 : 930.07 = 209.03 : x
  2. Step 2: Convert to fraction form
    619.99/930.07 = 209.03/x
  3. Step 3: Cross multiply
    619.99x = 930.07 × 209.03
  4. Step 4: Simplify right side
    619.99x = 194,408.14
  5. Step 5: Solve for x
    x = 194,408.14/619.99
  6. Step 6: Final answer
    x = 313.57

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Double scale
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Similar ratio
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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.