Home / 678,520.20-1,017,780.30-426,577.80

Finding the Fourth Proportional to 678,520.20, 1,017,780.30 and 426,577.80

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Solution

The fourth proportional to 678,520.20, 1,017,780.30 and 426,577.80 is: 639,866.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,520.20 : 1,017,780.30 = 426,577.80 : x
  2. Step 2: Convert to fraction form
    678,520.20/1,017,780.30 = 426,577.80/x
  3. Step 3: Cross multiply
    678,520.20x = 1,017,780.30 × 426,577.80
  4. Step 4: Simplify right side
    678,520.20x = 434,162,481,257.34
  5. Step 5: Solve for x
    x = 434,162,481,257.34/678,520.20
  6. Step 6: Final answer
    x = 639,866.70

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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.