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Finding the Fourth Proportional to 405,268.80, 607,845.60 and 124,814.40

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Solution

The fourth proportional to 405,268.80, 607,845.60 and 124,814.40 is: 187,203.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,268.80 : 607,845.60 = 124,814.40 : x
  2. Step 2: Convert to fraction form
    405,268.80/607,845.60 = 124,814.40/x
  3. Step 3: Cross multiply
    405,268.80x = 607,845.60 × 124,814.40
  4. Step 4: Simplify right side
    405,268.80x = 75,867,883,856.64
  5. Step 5: Solve for x
    x = 75,867,883,856.64/405,268.80
  6. Step 6: Final answer
    x = 187,203.86

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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.