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Finding the Fourth Proportional to 298,430.40, 447,645.60 and 251,191.20

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Solution

The fourth proportional to 298,430.40, 447,645.60 and 251,191.20 is: 376,786.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,430.40 : 447,645.60 = 251,191.20 : x
  2. Step 2: Convert to fraction form
    298,430.40/447,645.60 = 251,191.20/x
  3. Step 3: Cross multiply
    298,430.40x = 447,645.60 × 251,191.20
  4. Step 4: Simplify right side
    298,430.40x = 112,444,635,438.72
  5. Step 5: Solve for x
    x = 112,444,635,438.72/298,430.40
  6. Step 6: Final answer
    x = 376,786.80

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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.