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Finding the Fourth Proportional to 555,042.72, 765,961.20 and 300,393.84

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Solution

The fourth proportional to 555,042.72, 765,961.20 and 300,393.84 is: 414,544.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,042.72 : 765,961.20 = 300,393.84 : x
  2. Step 2: Convert to fraction form
    555,042.72/765,961.20 = 300,393.84/x
  3. Step 3: Cross multiply
    555,042.72x = 765,961.20 × 300,393.84
  4. Step 4: Simplify right side
    555,042.72x = 230,090,026,159.01
  5. Step 5: Solve for x
    x = 230,090,026,159.01/555,042.72
  6. Step 6: Final answer
    x = 414,544.71

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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.