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Finding the Fourth Proportional to 606.94, 909.93 and 423.79

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Solution

The fourth proportional to 606.94, 909.93 and 423.79 is: 635.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.94 : 909.93 = 423.79 : x
  2. Step 2: Convert to fraction form
    606.94/909.93 = 423.79/x
  3. Step 3: Cross multiply
    606.94x = 909.93 × 423.79
  4. Step 4: Simplify right side
    606.94x = 385,619.23
  5. Step 5: Solve for x
    x = 385,619.23/606.94
  6. Step 6: Final answer
    x = 635.35

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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.