Home / 678,830.80-1,018,246.20-663,278.80

Finding the Fourth Proportional to 678,830.80, 1,018,246.20 and 663,278.80

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Solution

The fourth proportional to 678,830.80, 1,018,246.20 and 663,278.80 is: 994,918.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,830.80 : 1,018,246.20 = 663,278.80 : x
  2. Step 2: Convert to fraction form
    678,830.80/1,018,246.20 = 663,278.80/x
  3. Step 3: Cross multiply
    678,830.80x = 1,018,246.20 × 663,278.80
  4. Step 4: Simplify right side
    678,830.80x = 675,381,117,640.56
  5. Step 5: Solve for x
    x = 675,381,117,640.56/678,830.80
  6. Step 6: Final answer
    x = 994,918.20

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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.