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Finding the Fourth Proportional to 485.00, 669.07 and 298.20

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Solution

The fourth proportional to 485.00, 669.07 and 298.20 is: 411.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.00 : 669.07 = 298.20 : x
  2. Step 2: Convert to fraction form
    485.00/669.07 = 298.20/x
  3. Step 3: Cross multiply
    485.00x = 669.07 × 298.20
  4. Step 4: Simplify right side
    485.00x = 199,514.11
  5. Step 5: Solve for x
    x = 199,514.11/485.00
  6. Step 6: Final answer
    x = 411.37

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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.