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Finding the Fourth Proportional to 298,019.40, 447,029.10 and 191,731.20

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Solution

The fourth proportional to 298,019.40, 447,029.10 and 191,731.20 is: 287,596.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,019.40 : 447,029.10 = 191,731.20 : x
  2. Step 2: Convert to fraction form
    298,019.40/447,029.10 = 191,731.20/x
  3. Step 3: Cross multiply
    298,019.40x = 447,029.10 × 191,731.20
  4. Step 4: Simplify right side
    298,019.40x = 85,709,425,777.92
  5. Step 5: Solve for x
    x = 85,709,425,777.92/298,019.40
  6. Step 6: Final answer
    x = 287,596.80

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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.