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Finding the Fourth Proportional to 555,039.72, 765,957.06 and 300,390.84

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Solution

The fourth proportional to 555,039.72, 765,957.06 and 300,390.84 is: 414,540.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,039.72 : 765,957.06 = 300,390.84 : x
  2. Step 2: Convert to fraction form
    555,039.72/765,957.06 = 300,390.84/x
  3. Step 3: Cross multiply
    555,039.72x = 765,957.06 × 300,390.84
  4. Step 4: Simplify right side
    555,039.72x = 230,086,484,657.33
  5. Step 5: Solve for x
    x = 230,086,484,657.33/555,039.72
  6. Step 6: Final answer
    x = 414,540.57

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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.