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Finding the Fourth Proportional to 722,071.11, 996,473.59 and 395,398.01

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Solution

The fourth proportional to 722,071.11, 996,473.59 and 395,398.01 is: 545,657.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,071.11 : 996,473.59 = 395,398.01 : x
  2. Step 2: Convert to fraction form
    722,071.11/996,473.59 = 395,398.01/x
  3. Step 3: Cross multiply
    722,071.11x = 996,473.59 × 395,398.01
  4. Step 4: Simplify right side
    722,071.11x = 394,003,672,625.20
  5. Step 5: Solve for x
    x = 394,003,672,625.20/722,071.11
  6. Step 6: Final answer
    x = 545,657.72

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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.