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Finding the Fourth Proportional to 606.75, 909.45 and 259.98

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Solution

The fourth proportional to 606.75, 909.45 and 259.98 is: 389.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.75 : 909.45 = 259.98 : x
  2. Step 2: Convert to fraction form
    606.75/909.45 = 259.98/x
  3. Step 3: Cross multiply
    606.75x = 909.45 × 259.98
  4. Step 4: Simplify right side
    606.75x = 236,438.81
  5. Step 5: Solve for x
    x = 236,438.81/606.75
  6. Step 6: Final answer
    x = 389.68

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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.