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Finding the Fourth Proportional to 298,278.63, 447,152.72 and 108,703.40

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Solution

The fourth proportional to 298,278.63, 447,152.72 and 108,703.40 is: 162,958.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,278.63 : 447,152.72 = 108,703.40 : x
  2. Step 2: Convert to fraction form
    298,278.63/447,152.72 = 108,703.40/x
  3. Step 3: Cross multiply
    298,278.63x = 447,152.72 × 108,703.40
  4. Step 4: Simplify right side
    298,278.63x = 48,607,018,203.97
  5. Step 5: Solve for x
    x = 48,607,018,203.97/298,278.63
  6. Step 6: Final answer
    x = 162,958.43

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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.