Home / 621,129.78-931,913.37-305,808.12

Finding the Fourth Proportional to 621,129.78, 931,913.37 and 305,808.12

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Solution

The fourth proportional to 621,129.78, 931,913.37 and 305,808.12 is: 458,819.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,129.78 : 931,913.37 = 305,808.12 : x
  2. Step 2: Convert to fraction form
    621,129.78/931,913.37 = 305,808.12/x
  3. Step 3: Cross multiply
    621,129.78x = 931,913.37 × 305,808.12
  4. Step 4: Simplify right side
    621,129.78x = 284,986,675,682.56
  5. Step 5: Solve for x
    x = 284,986,675,682.56/621,129.78
  6. Step 6: Final answer
    x = 458,819.86

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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.