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Finding the Fourth Proportional to 619.57, 929.30 and 290.41

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Solution

The fourth proportional to 619.57, 929.30 and 290.41 is: 435.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.57 : 929.30 = 290.41 : x
  2. Step 2: Convert to fraction form
    619.57/929.30 = 290.41/x
  3. Step 3: Cross multiply
    619.57x = 929.30 × 290.41
  4. Step 4: Simplify right side
    619.57x = 269,874.24
  5. Step 5: Solve for x
    x = 269,874.24/619.57
  6. Step 6: Final answer
    x = 435.58

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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.