Home / 769,872.30-1,155,005.46-320,443.80

Finding the Fourth Proportional to 769,872.30, 1,155,005.46 and 320,443.80

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Solution

The fourth proportional to 769,872.30, 1,155,005.46 and 320,443.80 is: 480,747.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,872.30 : 1,155,005.46 = 320,443.80 : x
  2. Step 2: Convert to fraction form
    769,872.30/1,155,005.46 = 320,443.80/x
  3. Step 3: Cross multiply
    769,872.30x = 1,155,005.46 × 320,443.80
  4. Step 4: Simplify right side
    769,872.30x = 370,114,338,623.15
  5. Step 5: Solve for x
    x = 370,114,338,623.15/769,872.30
  6. Step 6: Final answer
    x = 480,747.70

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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.