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Finding the Fourth Proportional to 455,325.20, 682,987.80 and 218,610.80

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Solution

The fourth proportional to 455,325.20, 682,987.80 and 218,610.80 is: 327,916.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,325.20 : 682,987.80 = 218,610.80 : x
  2. Step 2: Convert to fraction form
    455,325.20/682,987.80 = 218,610.80/x
  3. Step 3: Cross multiply
    455,325.20x = 682,987.80 × 218,610.80
  4. Step 4: Simplify right side
    455,325.20x = 149,308,509,348.24
  5. Step 5: Solve for x
    x = 149,308,509,348.24/455,325.20
  6. Step 6: Final answer
    x = 327,916.20

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1.5x scale

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.