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Finding the Fourth Proportional to 393,313.20, 590,115.60 and 378,733.20

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Solution

The fourth proportional to 393,313.20, 590,115.60 and 378,733.20 is: 568,240.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,313.20 : 590,115.60 = 378,733.20 : x
  2. Step 2: Convert to fraction form
    393,313.20/590,115.60 = 378,733.20/x
  3. Step 3: Cross multiply
    393,313.20x = 590,115.60 × 378,733.20
  4. Step 4: Simplify right side
    393,313.20x = 223,496,369,557.92
  5. Step 5: Solve for x
    x = 223,496,369,557.92/393,313.20
  6. Step 6: Final answer
    x = 568,240.20

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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.