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Finding the Fourth Proportional to 411,984.50, 568,490.76 and 239,940.05

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Solution

The fourth proportional to 411,984.50, 568,490.76 and 239,940.05 is: 331,089.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,984.50 : 568,490.76 = 239,940.05 : x
  2. Step 2: Convert to fraction form
    411,984.50/568,490.76 = 239,940.05/x
  3. Step 3: Cross multiply
    411,984.50x = 568,490.76 × 239,940.05
  4. Step 4: Simplify right side
    411,984.50x = 136,403,701,378.94
  5. Step 5: Solve for x
    x = 136,403,701,378.94/411,984.50
  6. Step 6: Final answer
    x = 331,089.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.