Home / 427,930.37-641,958.15-128,434.64

Finding the Fourth Proportional to 427,930.37, 641,958.15 and 128,434.64

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Solution

The fourth proportional to 427,930.37, 641,958.15 and 128,434.64 is: 192,670.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,930.37 : 641,958.15 = 128,434.64 : x
  2. Step 2: Convert to fraction form
    427,930.37/641,958.15 = 128,434.64/x
  3. Step 3: Cross multiply
    427,930.37x = 641,958.15 × 128,434.64
  4. Step 4: Simplify right side
    427,930.37x = 82,449,663,890.32
  5. Step 5: Solve for x
    x = 82,449,663,890.32/427,930.37
  6. Step 6: Final answer
    x = 192,670.75

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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.