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Finding the Fourth Proportional to 431,110.16, 645,561.09 and 359,855.62

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Solution

The fourth proportional to 431,110.16, 645,561.09 and 359,855.62 is: 538,861.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,110.16 : 645,561.09 = 359,855.62 : x
  2. Step 2: Convert to fraction form
    431,110.16/645,561.09 = 359,855.62/x
  3. Step 3: Cross multiply
    431,110.16x = 645,561.09 × 359,855.62
  4. Step 4: Simplify right side
    431,110.16x = 232,308,786,289.83
  5. Step 5: Solve for x
    x = 232,308,786,289.83/431,110.16
  6. Step 6: Final answer
    x = 538,861.78

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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.