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Finding the Fourth Proportional to 298,143.20, 447,225.60 and 87,802.40

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Solution

The fourth proportional to 298,143.20, 447,225.60 and 87,802.40 is: 131,706.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,143.20 : 447,225.60 = 87,802.40 : x
  2. Step 2: Convert to fraction form
    298,143.20/447,225.60 = 87,802.40/x
  3. Step 3: Cross multiply
    298,143.20x = 447,225.60 × 87,802.40
  4. Step 4: Simplify right side
    298,143.20x = 39,267,481,021.44
  5. Step 5: Solve for x
    x = 39,267,481,021.44/298,143.20
  6. Step 6: Final answer
    x = 131,706.78

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1.5x scale

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.