Home / 828,005.80-1,242,008.70-820,132.60

Finding the Fourth Proportional to 828,005.80, 1,242,008.70 and 820,132.60

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Solution

The fourth proportional to 828,005.80, 1,242,008.70 and 820,132.60 is: 1,230,198.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,005.80 : 1,242,008.70 = 820,132.60 : x
  2. Step 2: Convert to fraction form
    828,005.80/1,242,008.70 = 820,132.60/x
  3. Step 3: Cross multiply
    828,005.80x = 1,242,008.70 × 820,132.60
  4. Step 4: Simplify right side
    828,005.80x = 1,018,611,824,353.62
  5. Step 5: Solve for x
    x = 1,018,611,824,353.62/828,005.80
  6. Step 6: Final answer
    x = 1,230,198.90

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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.