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Finding the Fourth Proportional to 306,987.55, 423,490.44 and 205,149.61

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Solution

The fourth proportional to 306,987.55, 423,490.44 and 205,149.61 is: 283,004.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,987.55 : 423,490.44 = 205,149.61 : x
  2. Step 2: Convert to fraction form
    306,987.55/423,490.44 = 205,149.61/x
  3. Step 3: Cross multiply
    306,987.55x = 423,490.44 × 205,149.61
  4. Step 4: Simplify right side
    306,987.55x = 86,878,898,604.73
  5. Step 5: Solve for x
    x = 86,878,898,604.73/306,987.55
  6. Step 6: Final answer
    x = 283,004.63

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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.