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Finding the Fourth Proportional to 555,043.56, 765,971.94 and 313,279.72

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Solution

The fourth proportional to 555,043.56, 765,971.94 and 313,279.72 is: 432,332.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,043.56 : 765,971.94 = 313,279.72 : x
  2. Step 2: Convert to fraction form
    555,043.56/765,971.94 = 313,279.72/x
  3. Step 3: Cross multiply
    555,043.56x = 765,971.94 × 313,279.72
  4. Step 4: Simplify right side
    555,043.56x = 239,963,474,891.06
  5. Step 5: Solve for x
    x = 239,963,474,891.06/555,043.56
  6. Step 6: Final answer
    x = 432,332.69

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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.