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Finding the Fourth Proportional to 606.91, 910.37 and 485.94

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Solution

The fourth proportional to 606.91, 910.37 and 485.94 is: 728.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.91 : 910.37 = 485.94 : x
  2. Step 2: Convert to fraction form
    606.91/910.37 = 485.94/x
  3. Step 3: Cross multiply
    606.91x = 910.37 × 485.94
  4. Step 4: Simplify right side
    606.91x = 442,385.20
  5. Step 5: Solve for x
    x = 442,385.20/606.91
  6. Step 6: Final answer
    x = 728.91

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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.