Home / 678,821.76-1,018,200.96-279,362.88

Finding the Fourth Proportional to 678,821.76, 1,018,200.96 and 279,362.88

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Solution

The fourth proportional to 678,821.76, 1,018,200.96 and 279,362.88 is: 419,031.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,821.76 : 1,018,200.96 = 279,362.88 : x
  2. Step 2: Convert to fraction form
    678,821.76/1,018,200.96 = 279,362.88/x
  3. Step 3: Cross multiply
    678,821.76x = 1,018,200.96 × 279,362.88
  4. Step 4: Simplify right side
    678,821.76x = 284,447,552,604.37
  5. Step 5: Solve for x
    x = 284,447,552,604.37/678,821.76
  6. Step 6: Final answer
    x = 419,031.28

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1.5x scale

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.