Home / 769,287.40-1,154,144.40-320,219.80

Finding the Fourth Proportional to 769,287.40, 1,154,144.40 and 320,219.80

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Solution

The fourth proportional to 769,287.40, 1,154,144.40 and 320,219.80 is: 480,418.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,287.40 : 1,154,144.40 = 320,219.80 : x
  2. Step 2: Convert to fraction form
    769,287.40/1,154,144.40 = 320,219.80/x
  3. Step 3: Cross multiply
    769,287.40x = 1,154,144.40 × 320,219.80
  4. Step 4: Simplify right side
    769,287.40x = 369,579,888,939.12
  5. Step 5: Solve for x
    x = 369,579,888,939.12/769,287.40
  6. Step 6: Final answer
    x = 480,418.49

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Double scale
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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.