Home / 780,008.20-1,170,012.30-691,361.80

Finding the Fourth Proportional to 780,008.20, 1,170,012.30 and 691,361.80

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Solution

The fourth proportional to 780,008.20, 1,170,012.30 and 691,361.80 is: 1,037,042.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,008.20 : 1,170,012.30 = 691,361.80 : x
  2. Step 2: Convert to fraction form
    780,008.20/1,170,012.30 = 691,361.80/x
  3. Step 3: Cross multiply
    780,008.20x = 1,170,012.30 × 691,361.80
  4. Step 4: Simplify right side
    780,008.20x = 808,901,809,750.14
  5. Step 5: Solve for x
    x = 808,901,809,750.14/780,008.20
  6. Step 6: Final answer
    x = 1,037,042.70

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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.