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Finding the Fourth Proportional to 328,573.38, 492,671.32 and 128,659.70

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Solution

The fourth proportional to 328,573.38, 492,671.32 and 128,659.70 is: 192,915.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,573.38 : 492,671.32 = 128,659.70 : x
  2. Step 2: Convert to fraction form
    328,573.38/492,671.32 = 128,659.70/x
  3. Step 3: Cross multiply
    328,573.38x = 492,671.32 × 128,659.70
  4. Step 4: Simplify right side
    328,573.38x = 63,386,944,229.80
  5. Step 5: Solve for x
    x = 63,386,944,229.80/328,573.38
  6. Step 6: Final answer
    x = 192,915.64

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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.