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Finding the Fourth Proportional to 619.20, 921.73 and 609.97

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Solution

The fourth proportional to 619.20, 921.73 and 609.97 is: 907.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.20 : 921.73 = 609.97 : x
  2. Step 2: Convert to fraction form
    619.20/921.73 = 609.97/x
  3. Step 3: Cross multiply
    619.20x = 921.73 × 609.97
  4. Step 4: Simplify right side
    619.20x = 562,224.60
  5. Step 5: Solve for x
    x = 562,224.60/619.20
  6. Step 6: Final answer
    x = 907.99

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.