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Finding the Fourth Proportional to 606.35, 835.86 and 419.76

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Solution

The fourth proportional to 606.35, 835.86 and 419.76 is: 578.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.35 : 835.86 = 419.76 : x
  2. Step 2: Convert to fraction form
    606.35/835.86 = 419.76/x
  3. Step 3: Cross multiply
    606.35x = 835.86 × 419.76
  4. Step 4: Simplify right side
    606.35x = 350,860.59
  5. Step 5: Solve for x
    x = 350,860.59/606.35
  6. Step 6: Final answer
    x = 578.65

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Why These Related Problems?

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