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Finding the Fourth Proportional to 721,783.98, 996,046.20 and 399,474.72

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Solution

The fourth proportional to 721,783.98, 996,046.20 and 399,474.72 is: 551,266.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,783.98 : 996,046.20 = 399,474.72 : x
  2. Step 2: Convert to fraction form
    721,783.98/996,046.20 = 399,474.72/x
  3. Step 3: Cross multiply
    721,783.98x = 996,046.20 × 399,474.72
  4. Step 4: Simplify right side
    721,783.98x = 397,895,276,852.06
  5. Step 5: Solve for x
    x = 397,895,276,852.06/721,783.98
  6. Step 6: Final answer
    x = 551,266.43

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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.