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Finding the Fourth Proportional to 555,042.56, 765,970.56 and 313,278.72

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Solution

The fourth proportional to 555,042.56, 765,970.56 and 313,278.72 is: 432,331.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,042.56 : 765,970.56 = 313,278.72 : x
  2. Step 2: Convert to fraction form
    555,042.56/765,970.56 = 313,278.72/x
  3. Step 3: Cross multiply
    555,042.56x = 765,970.56 × 313,278.72
  4. Step 4: Simplify right side
    555,042.56x = 239,962,276,594.48
  5. Step 5: Solve for x
    x = 239,962,276,594.48/555,042.56
  6. Step 6: Final answer
    x = 432,331.31

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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.