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Finding the Fourth Proportional to 393,499.20, 589,360.72 and 275,696.32

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Solution

The fourth proportional to 393,499.20, 589,360.72 and 275,696.32 is: 412,922.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,499.20 : 589,360.72 = 275,696.32 : x
  2. Step 2: Convert to fraction form
    393,499.20/589,360.72 = 275,696.32/x
  3. Step 3: Cross multiply
    393,499.20x = 589,360.72 × 275,696.32
  4. Step 4: Simplify right side
    393,499.20x = 162,484,581,656.55
  5. Step 5: Solve for x
    x = 162,484,581,656.55/393,499.20
  6. Step 6: Final answer
    x = 412,922.27

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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.