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Finding the Fourth Proportional to 405,903.18, 608,783.49 and 125,422.86

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Solution

The fourth proportional to 405,903.18, 608,783.49 and 125,422.86 is: 188,112.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,903.18 : 608,783.49 = 125,422.86 : x
  2. Step 2: Convert to fraction form
    405,903.18/608,783.49 = 125,422.86/x
  3. Step 3: Cross multiply
    405,903.18x = 608,783.49 × 125,422.86
  4. Step 4: Simplify right side
    405,903.18x = 76,355,366,436.58
  5. Step 5: Solve for x
    x = 76,355,366,436.58/405,903.18
  6. Step 6: Final answer
    x = 188,112.26

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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.