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Finding the Fourth Proportional to 398,172.80, 597,246.40 and 131,945.60

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Solution

The fourth proportional to 398,172.80, 597,246.40 and 131,945.60 is: 197,914.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,172.80 : 597,246.40 = 131,945.60 : x
  2. Step 2: Convert to fraction form
    398,172.80/597,246.40 = 131,945.60/x
  3. Step 3: Cross multiply
    398,172.80x = 597,246.40 × 131,945.60
  4. Step 4: Simplify right side
    398,172.80x = 78,804,034,595.84
  5. Step 5: Solve for x
    x = 78,804,034,595.84/398,172.80
  6. Step 6: Final answer
    x = 197,914.16

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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.