Home / 678,492.80-1,017,739.20-398,556.80

Finding the Fourth Proportional to 678,492.80, 1,017,739.20 and 398,556.80

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Solution

The fourth proportional to 678,492.80, 1,017,739.20 and 398,556.80 is: 597,835.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,492.80 : 1,017,739.20 = 398,556.80 : x
  2. Step 2: Convert to fraction form
    678,492.80/1,017,739.20 = 398,556.80/x
  3. Step 3: Cross multiply
    678,492.80x = 1,017,739.20 × 398,556.80
  4. Step 4: Simplify right side
    678,492.80x = 405,626,878,786.56
  5. Step 5: Solve for x
    x = 405,626,878,786.56/678,492.80
  6. Step 6: Final answer
    x = 597,835.20

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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.