Home / 678,648.20-1,017,972.30-636,657.80

Finding the Fourth Proportional to 678,648.20, 1,017,972.30 and 636,657.80

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Solution

The fourth proportional to 678,648.20, 1,017,972.30 and 636,657.80 is: 954,986.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,648.20 : 1,017,972.30 = 636,657.80 : x
  2. Step 2: Convert to fraction form
    678,648.20/1,017,972.30 = 636,657.80/x
  3. Step 3: Cross multiply
    678,648.20x = 1,017,972.30 × 636,657.80
  4. Step 4: Simplify right side
    678,648.20x = 648,100,004,978.94
  5. Step 5: Solve for x
    x = 648,100,004,978.94/678,648.20
  6. Step 6: Final answer
    x = 954,986.70

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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.