Home / 769,869.30-1,155,000.96-320,440.80

Finding the Fourth Proportional to 769,869.30, 1,155,000.96 and 320,440.80

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Solution

The fourth proportional to 769,869.30, 1,155,000.96 and 320,440.80 is: 480,743.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,869.30 : 1,155,000.96 = 320,440.80 : x
  2. Step 2: Convert to fraction form
    769,869.30/1,155,000.96 = 320,440.80/x
  3. Step 3: Cross multiply
    769,869.30x = 1,155,000.96 × 320,440.80
  4. Step 4: Simplify right side
    769,869.30x = 370,109,431,623.17
  5. Step 5: Solve for x
    x = 370,109,431,623.17/769,869.30
  6. Step 6: Final answer
    x = 480,743.20

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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.