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Finding the Fourth Proportional to 393,630.20, 590,502.90 and 206,655.80

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Solution

The fourth proportional to 393,630.20, 590,502.90 and 206,655.80 is: 310,013.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,630.20 : 590,502.90 = 206,655.80 : x
  2. Step 2: Convert to fraction form
    393,630.20/590,502.90 = 206,655.80/x
  3. Step 3: Cross multiply
    393,630.20x = 590,502.90 × 206,655.80
  4. Step 4: Simplify right side
    393,630.20x = 122,030,849,201.82
  5. Step 5: Solve for x
    x = 122,030,849,201.82/393,630.20
  6. Step 6: Final answer
    x = 310,013.94

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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.