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Finding the Fourth Proportional to 297,318.98, 445,974.58 and 72,681.38

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Solution

The fourth proportional to 297,318.98, 445,974.58 and 72,681.38 is: 109,021.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,318.98 : 445,974.58 = 72,681.38 : x
  2. Step 2: Convert to fraction form
    297,318.98/445,974.58 = 72,681.38/x
  3. Step 3: Cross multiply
    297,318.98x = 445,974.58 × 72,681.38
  4. Step 4: Simplify right side
    297,318.98x = 32,414,045,507.74
  5. Step 5: Solve for x
    x = 32,414,045,507.74/297,318.98
  6. Step 6: Final answer
    x = 109,021.11

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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.