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Finding the Fourth Proportional to 328,103.95, 492,196.99 and 128,398.56

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Solution

The fourth proportional to 328,103.95, 492,196.99 and 128,398.56 is: 192,613.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,103.95 : 492,196.99 = 128,398.56 : x
  2. Step 2: Convert to fraction form
    328,103.95/492,196.99 = 128,398.56/x
  3. Step 3: Cross multiply
    328,103.95x = 492,196.99 × 128,398.56
  4. Step 4: Simplify right side
    328,103.95x = 63,197,384,752.33
  5. Step 5: Solve for x
    x = 63,197,384,752.33/328,103.95
  6. Step 6: Final answer
    x = 192,613.91

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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.