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Finding the Fourth Proportional to 426,015.40, 639,155.69 and 126,497.54

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Solution

The fourth proportional to 426,015.40, 639,155.69 and 126,497.54 is: 189,785.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,015.40 : 639,155.69 = 126,497.54 : x
  2. Step 2: Convert to fraction form
    426,015.40/639,155.69 = 126,497.54/x
  3. Step 3: Cross multiply
    426,015.40x = 639,155.69 × 126,497.54
  4. Step 4: Simplify right side
    426,015.40x = 80,851,622,462.00
  5. Step 5: Solve for x
    x = 80,851,622,462.00/426,015.40
  6. Step 6: Final answer
    x = 189,785.68

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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.