Home / 430,940.16-646,408.46-131,419.86

Finding the Fourth Proportional to 430,940.16, 646,408.46 and 131,419.86

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Solution

The fourth proportional to 430,940.16, 646,408.46 and 131,419.86 is: 197,129.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,940.16 : 646,408.46 = 131,419.86 : x
  2. Step 2: Convert to fraction form
    430,940.16/646,408.46 = 131,419.86/x
  3. Step 3: Cross multiply
    430,940.16x = 646,408.46 × 131,419.86
  4. Step 4: Simplify right side
    430,940.16x = 84,950,909,316.02
  5. Step 5: Solve for x
    x = 84,950,909,316.02/430,940.16
  6. Step 6: Final answer
    x = 197,129.25

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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.