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Finding the Fourth Proportional to 486.01, 669.01 and 422.95

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Solution

The fourth proportional to 486.01, 669.01 and 422.95 is: 582.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.01 : 669.01 = 422.95 : x
  2. Step 2: Convert to fraction form
    486.01/669.01 = 422.95/x
  3. Step 3: Cross multiply
    486.01x = 669.01 × 422.95
  4. Step 4: Simplify right side
    486.01x = 282,957.78
  5. Step 5: Solve for x
    x = 282,957.78/486.01
  6. Step 6: Final answer
    x = 582.21

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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.