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Finding the Fourth Proportional to 331,478.40, 497,289.60 and 121,116

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Solution

The fourth proportional to 331,478.40, 497,289.60 and 121,116 is: 181,700.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,478.40 : 497,289.60 = 121,116 : x
  2. Step 2: Convert to fraction form
    331,478.40/497,289.60 = 121,116/x
  3. Step 3: Cross multiply
    331,478.40x = 497,289.60 × 121,116
  4. Step 4: Simplify right side
    331,478.40x = 60,229,727,193.60
  5. Step 5: Solve for x
    x = 60,229,727,193.60/331,478.40
  6. Step 6: Final answer
    x = 181,700.31

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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.