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Finding the Fourth Proportional to 328,229.97, 492,147.78 and 128,312.25

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Solution

The fourth proportional to 328,229.97, 492,147.78 and 128,312.25 is: 192,391.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,229.97 : 492,147.78 = 128,312.25 : x
  2. Step 2: Convert to fraction form
    328,229.97/492,147.78 = 128,312.25/x
  3. Step 3: Cross multiply
    328,229.97x = 492,147.78 × 128,312.25
  4. Step 4: Simplify right side
    328,229.97x = 63,148,588,984.31
  5. Step 5: Solve for x
    x = 63,148,588,984.31/328,229.97
  6. Step 6: Final answer
    x = 192,391.29

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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.