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Finding the Fourth Proportional to 419,746.60, 629,619.90 and 124,258.60

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Solution

The fourth proportional to 419,746.60, 629,619.90 and 124,258.60 is: 186,387.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,746.60 : 629,619.90 = 124,258.60 : x
  2. Step 2: Convert to fraction form
    419,746.60/629,619.90 = 124,258.60/x
  3. Step 3: Cross multiply
    419,746.60x = 629,619.90 × 124,258.60
  4. Step 4: Simplify right side
    419,746.60x = 78,235,687,306.14
  5. Step 5: Solve for x
    x = 78,235,687,306.14/419,746.60
  6. Step 6: Final answer
    x = 186,387.90

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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.