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Finding the Fourth Proportional to 331,605.60, 497,408.40 and 82,287.60

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Solution

The fourth proportional to 331,605.60, 497,408.40 and 82,287.60 is: 123,431.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,605.60 : 497,408.40 = 82,287.60 : x
  2. Step 2: Convert to fraction form
    331,605.60/497,408.40 = 82,287.60/x
  3. Step 3: Cross multiply
    331,605.60x = 497,408.40 × 82,287.60
  4. Step 4: Simplify right side
    331,605.60x = 40,930,543,455.84
  5. Step 5: Solve for x
    x = 40,930,543,455.84/331,605.60
  6. Step 6: Final answer
    x = 123,431.40

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1.5x scale

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.