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Finding the Fourth Proportional to 446.76, 670.23 and 138.61

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Solution

The fourth proportional to 446.76, 670.23 and 138.61 is: 207.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.76 : 670.23 = 138.61 : x
  2. Step 2: Convert to fraction form
    446.76/670.23 = 138.61/x
  3. Step 3: Cross multiply
    446.76x = 670.23 × 138.61
  4. Step 4: Simplify right side
    446.76x = 92,901.81
  5. Step 5: Solve for x
    x = 92,901.81/446.76
  6. Step 6: Final answer
    x = 207.95

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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.