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Finding the Fourth Proportional to 606.66, 909.99 and 485.69

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Solution

The fourth proportional to 606.66, 909.99 and 485.69 is: 728.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.66 : 909.99 = 485.69 : x
  2. Step 2: Convert to fraction form
    606.66/909.99 = 485.69/x
  3. Step 3: Cross multiply
    606.66x = 909.99 × 485.69
  4. Step 4: Simplify right side
    606.66x = 441,968.49
  5. Step 5: Solve for x
    x = 441,968.49/606.66
  6. Step 6: Final answer
    x = 728.53

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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.