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Finding the Fourth Proportional to 328,233.80, 492,204.90 and 128,487.80

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Solution

The fourth proportional to 328,233.80, 492,204.90 and 128,487.80 is: 192,674.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,233.80 : 492,204.90 = 128,487.80 : x
  2. Step 2: Convert to fraction form
    328,233.80/492,204.90 = 128,487.80/x
  3. Step 3: Cross multiply
    328,233.80x = 492,204.90 × 128,487.80
  4. Step 4: Simplify right side
    328,233.80x = 63,242,324,750.22
  5. Step 5: Solve for x
    x = 63,242,324,750.22/328,233.80
  6. Step 6: Final answer
    x = 192,674.63

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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.