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Finding the Fourth Proportional to 507,998.36, 762,029.20 and 134,021.72

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Solution

The fourth proportional to 507,998.36, 762,029.20 and 134,021.72 is: 201,040.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    507,998.36 : 762,029.20 = 134,021.72 : x
  2. Step 2: Convert to fraction form
    507,998.36/762,029.20 = 134,021.72/x
  3. Step 3: Cross multiply
    507,998.36x = 762,029.20 × 134,021.72
  4. Step 4: Simplify right side
    507,998.36x = 102,128,464,074.22
  5. Step 5: Solve for x
    x = 102,128,464,074.22/507,998.36
  6. Step 6: Final answer
    x = 201,040.93

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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.