Home / 678,743.80-1,018,230.90-205,425.40

Finding the Fourth Proportional to 678,743.80, 1,018,230.90 and 205,425.40

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Solution

The fourth proportional to 678,743.80, 1,018,230.90 and 205,425.40 is: 308,172.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,743.80 : 1,018,230.90 = 205,425.40 : x
  2. Step 2: Convert to fraction form
    678,743.80/1,018,230.90 = 205,425.40/x
  3. Step 3: Cross multiply
    678,743.80x = 1,018,230.90 × 205,425.40
  4. Step 4: Simplify right side
    678,743.80x = 209,170,489,924.86
  5. Step 5: Solve for x
    x = 209,170,489,924.86/678,743.80
  6. Step 6: Final answer
    x = 308,172.97

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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.