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Finding the Fourth Proportional to 331,454.40, 497,246.40 and 131,740.80

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Solution

The fourth proportional to 331,454.40, 497,246.40 and 131,740.80 is: 197,636.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,454.40 : 497,246.40 = 131,740.80 : x
  2. Step 2: Convert to fraction form
    331,454.40/497,246.40 = 131,740.80/x
  3. Step 3: Cross multiply
    331,454.40x = 497,246.40 × 131,740.80
  4. Step 4: Simplify right side
    331,454.40x = 65,507,638,533.12
  5. Step 5: Solve for x
    x = 65,507,638,533.12/331,454.40
  6. Step 6: Final answer
    x = 197,636.96

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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.