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Finding the Fourth Proportional to 328,515.82, 492,773.73 and 128,930.20

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Solution

The fourth proportional to 328,515.82, 492,773.73 and 128,930.20 is: 193,395.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,515.82 : 492,773.73 = 128,930.20 : x
  2. Step 2: Convert to fraction form
    328,515.82/492,773.73 = 128,930.20/x
  3. Step 3: Cross multiply
    328,515.82x = 492,773.73 × 128,930.20
  4. Step 4: Simplify right side
    328,515.82x = 63,533,415,563.65
  5. Step 5: Solve for x
    x = 63,533,415,563.65/328,515.82
  6. Step 6: Final answer
    x = 193,395.30

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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.