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Finding the Fourth Proportional to 555,005.34, 765,908.31 and 300,356.73

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Solution

The fourth proportional to 555,005.34, 765,908.31 and 300,356.73 is: 414,492.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,005.34 : 765,908.31 = 300,356.73 : x
  2. Step 2: Convert to fraction form
    555,005.34/765,908.31 = 300,356.73/x
  3. Step 3: Cross multiply
    555,005.34x = 765,908.31 × 300,356.73
  4. Step 4: Simplify right side
    555,005.34x = 230,045,715,471.43
  5. Step 5: Solve for x
    x = 230,045,715,471.43/555,005.34
  6. Step 6: Final answer
    x = 414,492.80

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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.