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Finding the Fourth Proportional to 492,578.55, 738,638.19 and 255,857.67

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Solution

The fourth proportional to 492,578.55, 738,638.19 and 255,857.67 is: 383,667.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,578.55 : 738,638.19 = 255,857.67 : x
  2. Step 2: Convert to fraction form
    492,578.55/738,638.19 = 255,857.67/x
  3. Step 3: Cross multiply
    492,578.55x = 738,638.19 × 255,857.67
  4. Step 4: Simplify right side
    492,578.55x = 188,986,246,266.42
  5. Step 5: Solve for x
    x = 188,986,246,266.42/492,578.55
  6. Step 6: Final answer
    x = 383,667.23

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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.