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Finding the Fourth Proportional to 668,820.60, 1,003,230.90 and 219,610.80

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Solution

The fourth proportional to 668,820.60, 1,003,230.90 and 219,610.80 is: 329,416.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,820.60 : 1,003,230.90 = 219,610.80 : x
  2. Step 2: Convert to fraction form
    668,820.60/1,003,230.90 = 219,610.80/x
  3. Step 3: Cross multiply
    668,820.60x = 1,003,230.90 × 219,610.80
  4. Step 4: Simplify right side
    668,820.60x = 220,320,340,533.72
  5. Step 5: Solve for x
    x = 220,320,340,533.72/668,820.60
  6. Step 6: Final answer
    x = 329,416.20

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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.