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Finding the Fourth Proportional to 298,478.80, 447,718.20 and 265,819.60

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Solution

The fourth proportional to 298,478.80, 447,718.20 and 265,819.60 is: 398,729.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,478.80 : 447,718.20 = 265,819.60 : x
  2. Step 2: Convert to fraction form
    298,478.80/447,718.20 = 265,819.60/x
  3. Step 3: Cross multiply
    298,478.80x = 447,718.20 × 265,819.60
  4. Step 4: Simplify right side
    298,478.80x = 119,012,272,836.72
  5. Step 5: Solve for x
    x = 119,012,272,836.72/298,478.80
  6. Step 6: Final answer
    x = 398,729.40

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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.