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Finding the Fourth Proportional to 328,640.90, 492,766.95 and 171,176.90

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Solution

The fourth proportional to 328,640.90, 492,766.95 and 171,176.90 is: 256,664.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,640.90 : 492,766.95 = 171,176.90 : x
  2. Step 2: Convert to fraction form
    328,640.90/492,766.95 = 171,176.90/x
  3. Step 3: Cross multiply
    328,640.90x = 492,766.95 × 171,176.90
  4. Step 4: Simplify right side
    328,640.90x = 84,350,318,923.46
  5. Step 5: Solve for x
    x = 84,350,318,923.46/328,640.90
  6. Step 6: Final answer
    x = 256,664.09

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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.