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Finding the Fourth Proportional to 298,326.72, 447,356.16 and 87,890.88

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Solution

The fourth proportional to 298,326.72, 447,356.16 and 87,890.88 is: 131,796.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,326.72 : 447,356.16 = 87,890.88 : x
  2. Step 2: Convert to fraction form
    298,326.72/447,356.16 = 87,890.88/x
  3. Step 3: Cross multiply
    298,326.72x = 447,356.16 × 87,890.88
  4. Step 4: Simplify right side
    298,326.72x = 39,318,526,575.82
  5. Step 5: Solve for x
    x = 39,318,526,575.82/298,326.72
  6. Step 6: Final answer
    x = 131,796.87

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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.