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Finding the Fourth Proportional to 319,914.40, 480,037.20 and 130,513.60

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Solution

The fourth proportional to 319,914.40, 480,037.20 and 130,513.60 is: 195,837.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,914.40 : 480,037.20 = 130,513.60 : x
  2. Step 2: Convert to fraction form
    319,914.40/480,037.20 = 130,513.60/x
  3. Step 3: Cross multiply
    319,914.40x = 480,037.20 × 130,513.60
  4. Step 4: Simplify right side
    319,914.40x = 62,651,383,105.92
  5. Step 5: Solve for x
    x = 62,651,383,105.92/319,914.40
  6. Step 6: Final answer
    x = 195,837.96

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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.