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Finding the Fourth Proportional to 446.30, 669.35 and 121.70

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Solution

The fourth proportional to 446.30, 669.35 and 121.70 is: 182.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.30 : 669.35 = 121.70 : x
  2. Step 2: Convert to fraction form
    446.30/669.35 = 121.70/x
  3. Step 3: Cross multiply
    446.30x = 669.35 × 121.70
  4. Step 4: Simplify right side
    446.30x = 81,459.90
  5. Step 5: Solve for x
    x = 81,459.90/446.30
  6. Step 6: Final answer
    x = 182.52

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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.