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Finding the Fourth Proportional to 556,610.96, 768,195.56 and 311,688.98

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Solution

The fourth proportional to 556,610.96, 768,195.56 and 311,688.98 is: 430,171.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,610.96 : 768,195.56 = 311,688.98 : x
  2. Step 2: Convert to fraction form
    556,610.96/768,195.56 = 311,688.98/x
  3. Step 3: Cross multiply
    556,610.96x = 768,195.56 × 311,688.98
  4. Step 4: Simplify right side
    556,610.96x = 239,438,093,236.64
  5. Step 5: Solve for x
    x = 239,438,093,236.64/556,610.96
  6. Step 6: Final answer
    x = 430,171.36

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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.