Home / 743,007.98-1,025,354.94-420,780.80

Finding the Fourth Proportional to 743,007.98, 1,025,354.94 and 420,780.80

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Solution

The fourth proportional to 743,007.98, 1,025,354.94 and 420,780.80 is: 580,679.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,007.98 : 1,025,354.94 = 420,780.80 : x
  2. Step 2: Convert to fraction form
    743,007.98/1,025,354.94 = 420,780.80/x
  3. Step 3: Cross multiply
    743,007.98x = 1,025,354.94 × 420,780.80
  4. Step 4: Simplify right side
    743,007.98x = 431,449,672,922.61
  5. Step 5: Solve for x
    x = 431,449,672,922.61/743,007.98
  6. Step 6: Final answer
    x = 580,679.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.