Home / 818,820.80-1,228,231.20-678,852.80

Finding the Fourth Proportional to 818,820.80, 1,228,231.20 and 678,852.80

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Solution

The fourth proportional to 818,820.80, 1,228,231.20 and 678,852.80 is: 1,018,279.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,820.80 : 1,228,231.20 = 678,852.80 : x
  2. Step 2: Convert to fraction form
    818,820.80/1,228,231.20 = 678,852.80/x
  3. Step 3: Cross multiply
    818,820.80x = 1,228,231.20 × 678,852.80
  4. Step 4: Simplify right side
    818,820.80x = 833,788,189,167.36
  5. Step 5: Solve for x
    x = 833,788,189,167.36/818,820.80
  6. Step 6: Final answer
    x = 1,018,279.20

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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.