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Finding the Fourth Proportional to 722,056.86, 996,446.34 and 399,772.71

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Solution

The fourth proportional to 722,056.86, 996,446.34 and 399,772.71 is: 551,690.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,056.86 : 996,446.34 = 399,772.71 : x
  2. Step 2: Convert to fraction form
    722,056.86/996,446.34 = 399,772.71/x
  3. Step 3: Cross multiply
    722,056.86x = 996,446.34 × 399,772.71
  4. Step 4: Simplify right side
    722,056.86x = 398,352,053,711.38
  5. Step 5: Solve for x
    x = 398,352,053,711.38/722,056.86
  6. Step 6: Final answer
    x = 551,690.70

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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.