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Finding the Fourth Proportional to 290,469.60, 435,704.40 and 103,487.20

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Solution

The fourth proportional to 290,469.60, 435,704.40 and 103,487.20 is: 155,230.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,469.60 : 435,704.40 = 103,487.20 : x
  2. Step 2: Convert to fraction form
    290,469.60/435,704.40 = 103,487.20/x
  3. Step 3: Cross multiply
    290,469.60x = 435,704.40 × 103,487.20
  4. Step 4: Simplify right side
    290,469.60x = 45,089,828,383.68
  5. Step 5: Solve for x
    x = 45,089,828,383.68/290,469.60
  6. Step 6: Final answer
    x = 155,230.80

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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.