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Finding the Fourth Proportional to 403,245.63, 556,474.59 and 221,953.68

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Solution

The fourth proportional to 403,245.63, 556,474.59 and 221,953.68 is: 306,293.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,245.63 : 556,474.59 = 221,953.68 : x
  2. Step 2: Convert to fraction form
    403,245.63/556,474.59 = 221,953.68/x
  3. Step 3: Cross multiply
    403,245.63x = 556,474.59 × 221,953.68
  4. Step 4: Simplify right side
    403,245.63x = 123,511,583,076.99
  5. Step 5: Solve for x
    x = 123,511,583,076.99/403,245.63
  6. Step 6: Final answer
    x = 306,293.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.