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Finding the Fourth Proportional to 721,989.83, 996,306.44 and 395,239.64

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Solution

The fourth proportional to 721,989.83, 996,306.44 and 395,239.64 is: 545,409.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,989.83 : 996,306.44 = 395,239.64 : x
  2. Step 2: Convert to fraction form
    721,989.83/996,306.44 = 395,239.64/x
  3. Step 3: Cross multiply
    721,989.83x = 996,306.44 × 395,239.64
  4. Step 4: Simplify right side
    721,989.83x = 393,779,791,717.55
  5. Step 5: Solve for x
    x = 393,779,791,717.55/721,989.83
  6. Step 6: Final answer
    x = 545,409.06

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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.