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Finding the Fourth Proportional to 455,008.20, 682,512.30 and 448,009.80

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Solution

The fourth proportional to 455,008.20, 682,512.30 and 448,009.80 is: 672,014.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,008.20 : 682,512.30 = 448,009.80 : x
  2. Step 2: Convert to fraction form
    455,008.20/682,512.30 = 448,009.80/x
  3. Step 3: Cross multiply
    455,008.20x = 682,512.30 × 448,009.80
  4. Step 4: Simplify right side
    455,008.20x = 305,772,199,020.54
  5. Step 5: Solve for x
    x = 305,772,199,020.54/455,008.20
  6. Step 6: Final answer
    x = 672,014.70

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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.