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Finding the Third Proportional to 405.63 and 672.05

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Solution

The third proportional to 405.63 and 672.05 is: 1,113.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.63 : 672.05 = 672.05 : x
  2. Step 2: Convert to fraction form
    405.63/672.05 = 672.05/x
  3. Step 3: Cross multiply
    405.63x = 672.05 × 672.05
  4. Step 4: Simplify right side
    405.63x = 451,647.00
  5. Step 5: Solve for x
    x = 451,647.00/405.63
  6. Step 6: Final answer
    x = 1,113.44

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Why These Related Problems?

These problems maintain the same ratio (1.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.