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Finding the Fourth Proportional to 492,638.72, 738,953.62 and 155,679.44

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Solution

The fourth proportional to 492,638.72, 738,953.62 and 155,679.44 is: 233,517.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,638.72 : 738,953.62 = 155,679.44 : x
  2. Step 2: Convert to fraction form
    492,638.72/738,953.62 = 155,679.44/x
  3. Step 3: Cross multiply
    492,638.72x = 738,953.62 × 155,679.44
  4. Step 4: Simplify right side
    492,638.72x = 115,039,885,747.57
  5. Step 5: Solve for x
    x = 115,039,885,747.57/492,638.72
  6. Step 6: Final answer
    x = 233,517.75

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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.