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Finding the Fourth Proportional to 328,514.72, 492,560.22 and 128,855.29

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Solution

The fourth proportional to 328,514.72, 492,560.22 and 128,855.29 is: 193,199.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,514.72 : 492,560.22 = 128,855.29 : x
  2. Step 2: Convert to fraction form
    328,514.72/492,560.22 = 128,855.29/x
  3. Step 3: Cross multiply
    328,514.72x = 492,560.22 × 128,855.29
  4. Step 4: Simplify right side
    328,514.72x = 63,468,990,364.66
  5. Step 5: Solve for x
    x = 63,468,990,364.66/328,514.72
  6. Step 6: Final answer
    x = 193,199.84

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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.