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Finding the Fourth Proportional to 293,136.40, 439,704.60 and 71,520.40

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Solution

The fourth proportional to 293,136.40, 439,704.60 and 71,520.40 is: 107,280.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    293,136.40 : 439,704.60 = 71,520.40 : x
  2. Step 2: Convert to fraction form
    293,136.40/439,704.60 = 71,520.40/x
  3. Step 3: Cross multiply
    293,136.40x = 439,704.60 × 71,520.40
  4. Step 4: Simplify right side
    293,136.40x = 31,447,848,873.84
  5. Step 5: Solve for x
    x = 31,447,848,873.84/293,136.40
  6. Step 6: Final answer
    x = 107,280.60

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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.