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Finding the Fourth Proportional to 298,051.20, 447,076.80 and 140,587.20

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Solution

The fourth proportional to 298,051.20, 447,076.80 and 140,587.20 is: 210,880.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,051.20 : 447,076.80 = 140,587.20 : x
  2. Step 2: Convert to fraction form
    298,051.20/447,076.80 = 140,587.20/x
  3. Step 3: Cross multiply
    298,051.20x = 447,076.80 × 140,587.20
  4. Step 4: Simplify right side
    298,051.20x = 62,853,275,496.96
  5. Step 5: Solve for x
    x = 62,853,275,496.96/298,051.20
  6. Step 6: Final answer
    x = 210,880.80

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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.