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Finding the Fourth Proportional to 722,091.76, 996,502.16 and 395,418.56

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Solution

The fourth proportional to 722,091.76, 996,502.16 and 395,418.56 is: 545,686.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,091.76 : 996,502.16 = 395,418.56 : x
  2. Step 2: Convert to fraction form
    722,091.76/996,502.16 = 395,418.56/x
  3. Step 3: Cross multiply
    722,091.76x = 996,502.16 × 395,418.56
  4. Step 4: Simplify right side
    722,091.76x = 394,035,445,150.13
  5. Step 5: Solve for x
    x = 394,035,445,150.13/722,091.76
  6. Step 6: Final answer
    x = 545,686.11

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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.