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Finding the Fourth Proportional to 328,103.88, 492,196.86 and 128,398.44

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Solution

The fourth proportional to 328,103.88, 492,196.86 and 128,398.44 is: 192,613.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,103.88 : 492,196.86 = 128,398.44 : x
  2. Step 2: Convert to fraction form
    328,103.88/492,196.86 = 128,398.44/x
  3. Step 3: Cross multiply
    328,103.88x = 492,196.86 × 128,398.44
  4. Step 4: Simplify right side
    328,103.88x = 63,197,308,996.90
  5. Step 5: Solve for x
    x = 63,197,308,996.90/328,103.88
  6. Step 6: Final answer
    x = 192,613.72

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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.