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Finding the Fourth Proportional to 328,608.40, 492,912.60 and 128,935.30

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Solution

The fourth proportional to 328,608.40, 492,912.60 and 128,935.30 is: 193,402.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,608.40 : 492,912.60 = 128,935.30 : x
  2. Step 2: Convert to fraction form
    328,608.40/492,912.60 = 128,935.30/x
  3. Step 3: Cross multiply
    328,608.40x = 492,912.60 × 128,935.30
  4. Step 4: Simplify right side
    328,608.40x = 63,553,833,954.78
  5. Step 5: Solve for x
    x = 63,553,833,954.78/328,608.40
  6. Step 6: Final answer
    x = 193,402.95

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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.