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Finding the Fourth Proportional to 721,940.93, 996,290.23 and 395,248.43

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Solution

The fourth proportional to 721,940.93, 996,290.23 and 395,248.43 is: 545,449.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,940.93 : 996,290.23 = 395,248.43 : x
  2. Step 2: Convert to fraction form
    721,940.93/996,290.23 = 395,248.43/x
  3. Step 3: Cross multiply
    721,940.93x = 996,290.23 × 395,248.43
  4. Step 4: Simplify right side
    721,940.93x = 393,782,149,231.84
  5. Step 5: Solve for x
    x = 393,782,149,231.84/721,940.93
  6. Step 6: Final answer
    x = 545,449.26

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1.5x scale

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.