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Finding the Fourth Proportional to 328,520.40, 492,780.60 and 128,847.30

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Solution

The fourth proportional to 328,520.40, 492,780.60 and 128,847.30 is: 193,270.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,520.40 : 492,780.60 = 128,847.30 : x
  2. Step 2: Convert to fraction form
    328,520.40/492,780.60 = 128,847.30/x
  3. Step 3: Cross multiply
    328,520.40x = 492,780.60 × 128,847.30
  4. Step 4: Simplify right side
    328,520.40x = 63,493,449,802.38
  5. Step 5: Solve for x
    x = 63,493,449,802.38/328,520.40
  6. Step 6: Final answer
    x = 193,270.95

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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.