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Finding the Fourth Proportional to 681,820.14, 940,703.28 and 395,283.05

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Solution

The fourth proportional to 681,820.14, 940,703.28 and 395,283.05 is: 545,369.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,820.14 : 940,703.28 = 395,283.05 : x
  2. Step 2: Convert to fraction form
    681,820.14/940,703.28 = 395,283.05/x
  3. Step 3: Cross multiply
    681,820.14x = 940,703.28 × 395,283.05
  4. Step 4: Simplify right side
    681,820.14x = 371,844,056,959.89
  5. Step 5: Solve for x
    x = 371,844,056,959.89/681,820.14
  6. Step 6: Final answer
    x = 545,369.72

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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.