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Finding the Fourth Proportional to 328,517.82, 492,776.73 and 128,932.20

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Solution

The fourth proportional to 328,517.82, 492,776.73 and 128,932.20 is: 193,398.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,517.82 : 492,776.73 = 128,932.20 : x
  2. Step 2: Convert to fraction form
    328,517.82/492,776.73 = 128,932.20/x
  3. Step 3: Cross multiply
    328,517.82x = 492,776.73 × 128,932.20
  4. Step 4: Simplify right side
    328,517.82x = 63,534,787,907.71
  5. Step 5: Solve for x
    x = 63,534,787,907.71/328,517.82
  6. Step 6: Final answer
    x = 193,398.30

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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.