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Finding the Fourth Proportional to 298,793.80, 448,445.85 and 121,428.10

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Solution

The fourth proportional to 298,793.80, 448,445.85 and 121,428.10 is: 182,245.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,793.80 : 448,445.85 = 121,428.10 : x
  2. Step 2: Convert to fraction form
    298,793.80/448,445.85 = 121,428.10/x
  3. Step 3: Cross multiply
    298,793.80x = 448,445.85 × 121,428.10
  4. Step 4: Simplify right side
    298,793.80x = 54,453,927,518.39
  5. Step 5: Solve for x
    x = 54,453,927,518.39/298,793.80
  6. Step 6: Final answer
    x = 182,245.84

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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.