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Finding the Fourth Proportional to 446.76, 670.44 and 405.72

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Solution

The fourth proportional to 446.76, 670.44 and 405.72 is: 608.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.76 : 670.44 = 405.72 : x
  2. Step 2: Convert to fraction form
    446.76/670.44 = 405.72/x
  3. Step 3: Cross multiply
    446.76x = 670.44 × 405.72
  4. Step 4: Simplify right side
    446.76x = 272,010.92
  5. Step 5: Solve for x
    x = 272,010.92/446.76
  6. Step 6: Final answer
    x = 608.85

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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.