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Finding the Fourth Proportional to 722,206.34, 996,632.61 and 399,909.52

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Solution

The fourth proportional to 722,206.34, 996,632.61 and 399,909.52 is: 551,868.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,206.34 : 996,632.61 = 399,909.52 : x
  2. Step 2: Convert to fraction form
    722,206.34/996,632.61 = 399,909.52/x
  3. Step 3: Cross multiply
    722,206.34x = 996,632.61 × 399,909.52
  4. Step 4: Simplify right side
    722,206.34x = 398,562,864,690.21
  5. Step 5: Solve for x
    x = 398,562,864,690.21/722,206.34
  6. Step 6: Final answer
    x = 551,868.41

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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.