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Finding the Fourth Proportional to 722,056.11, 996,445.31 and 399,771.96

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Solution

The fourth proportional to 722,056.11, 996,445.31 and 399,771.96 is: 551,689.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,056.11 : 996,445.31 = 399,771.96 : x
  2. Step 2: Convert to fraction form
    722,056.11/996,445.31 = 399,771.96/x
  3. Step 3: Cross multiply
    722,056.11x = 996,445.31 × 399,771.96
  4. Step 4: Simplify right side
    722,056.11x = 398,350,892,612.65
  5. Step 5: Solve for x
    x = 398,350,892,612.65/722,056.11
  6. Step 6: Final answer
    x = 551,689.66

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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.