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Finding the Fourth Proportional to 405,418.60, 607,923.90 and 124,899.40

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Solution

The fourth proportional to 405,418.60, 607,923.90 and 124,899.40 is: 187,286.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,418.60 : 607,923.90 = 124,899.40 : x
  2. Step 2: Convert to fraction form
    405,418.60/607,923.90 = 124,899.40/x
  3. Step 3: Cross multiply
    405,418.60x = 607,923.90 × 124,899.40
  4. Step 4: Simplify right side
    405,418.60x = 75,929,330,355.66
  5. Step 5: Solve for x
    x = 75,929,330,355.66/405,418.60
  6. Step 6: Final answer
    x = 187,286.25

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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.