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Finding the Fourth Proportional to 328,481.40, 492,851.70 and 128,767.80

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Solution

The fourth proportional to 328,481.40, 492,851.70 and 128,767.80 is: 193,202.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,481.40 : 492,851.70 = 128,767.80 : x
  2. Step 2: Convert to fraction form
    328,481.40/492,851.70 = 128,767.80/x
  3. Step 3: Cross multiply
    328,481.40x = 492,851.70 × 128,767.80
  4. Step 4: Simplify right side
    328,481.40x = 63,463,429,135.26
  5. Step 5: Solve for x
    x = 63,463,429,135.26/328,481.40
  6. Step 6: Final answer
    x = 193,202.50

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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.