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Finding the Fourth Proportional to 331,326.60, 496,989.90 and 120,971.40

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Solution

The fourth proportional to 331,326.60, 496,989.90 and 120,971.40 is: 181,457.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,326.60 : 496,989.90 = 120,971.40 : x
  2. Step 2: Convert to fraction form
    331,326.60/496,989.90 = 120,971.40/x
  3. Step 3: Cross multiply
    331,326.60x = 496,989.90 × 120,971.40
  4. Step 4: Simplify right side
    331,326.60x = 60,121,563,988.86
  5. Step 5: Solve for x
    x = 60,121,563,988.86/331,326.60
  6. Step 6: Final answer
    x = 181,457.10

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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.