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Finding the Fourth Proportional to 722,245.42, 996,686.31 and 399,948.58

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Solution

The fourth proportional to 722,245.42, 996,686.31 and 399,948.58 is: 551,922.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,245.42 : 996,686.31 = 399,948.58 : x
  2. Step 2: Convert to fraction form
    722,245.42/996,686.31 = 399,948.58/x
  3. Step 3: Cross multiply
    722,245.42x = 996,686.31 × 399,948.58
  4. Step 4: Simplify right side
    722,245.42x = 398,623,274,389.94
  5. Step 5: Solve for x
    x = 398,623,274,389.94/722,245.42
  6. Step 6: Final answer
    x = 551,922.19

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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.