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Finding the Fourth Proportional to 681,345.28, 940,048.35 and 394,810

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Solution

The fourth proportional to 681,345.28, 940,048.35 and 394,810 is: 544,717.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,345.28 : 940,048.35 = 394,810 : x
  2. Step 2: Convert to fraction form
    681,345.28/940,048.35 = 394,810/x
  3. Step 3: Cross multiply
    681,345.28x = 940,048.35 × 394,810
  4. Step 4: Simplify right side
    681,345.28x = 371,140,489,063.50
  5. Step 5: Solve for x
    x = 371,140,489,063.50/681,345.28
  6. Step 6: Final answer
    x = 544,717.19

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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.