Home / 678,850.20-1,018,275.30-636,859.80

Finding the Fourth Proportional to 678,850.20, 1,018,275.30 and 636,859.80

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Solution

The fourth proportional to 678,850.20, 1,018,275.30 and 636,859.80 is: 955,289.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,850.20 : 1,018,275.30 = 636,859.80 : x
  2. Step 2: Convert to fraction form
    678,850.20/1,018,275.30 = 636,859.80/x
  3. Step 3: Cross multiply
    678,850.20x = 1,018,275.30 × 636,859.80
  4. Step 4: Simplify right side
    678,850.20x = 648,498,603,902.94
  5. Step 5: Solve for x
    x = 648,498,603,902.94/678,850.20
  6. Step 6: Final answer
    x = 955,289.70

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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.