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Finding the Fourth Proportional to 328,472.70, 492,709.05 and 275,328.60

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Solution

The fourth proportional to 328,472.70, 492,709.05 and 275,328.60 is: 412,992.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,472.70 : 492,709.05 = 275,328.60 : x
  2. Step 2: Convert to fraction form
    328,472.70/492,709.05 = 275,328.60/x
  3. Step 3: Cross multiply
    328,472.70x = 492,709.05 × 275,328.60
  4. Step 4: Simplify right side
    328,472.70x = 135,656,892,943.83
  5. Step 5: Solve for x
    x = 135,656,892,943.83/328,472.70
  6. Step 6: Final answer
    x = 412,992.90

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1.5x scale

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.