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Finding the Fourth Proportional to 426,172.60, 638,816.10 and 173,344.60

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Solution

The fourth proportional to 426,172.60, 638,816.10 and 173,344.60 is: 259,836.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,172.60 : 638,816.10 = 173,344.60 : x
  2. Step 2: Convert to fraction form
    426,172.60/638,816.10 = 173,344.60/x
  3. Step 3: Cross multiply
    426,172.60x = 638,816.10 × 173,344.60
  4. Step 4: Simplify right side
    426,172.60x = 110,735,321,328.06
  5. Step 5: Solve for x
    x = 110,735,321,328.06/426,172.60
  6. Step 6: Final answer
    x = 259,836.79

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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.