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Finding the Fourth Proportional to 722,206.68, 996,632.96 and 399,909.86

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Solution

The fourth proportional to 722,206.68, 996,632.96 and 399,909.86 is: 551,868.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,206.68 : 996,632.96 = 399,909.86 : x
  2. Step 2: Convert to fraction form
    722,206.68/996,632.96 = 399,909.86/x
  3. Step 3: Cross multiply
    722,206.68x = 996,632.96 × 399,909.86
  4. Step 4: Simplify right side
    722,206.68x = 398,563,346,509.14
  5. Step 5: Solve for x
    x = 398,563,346,509.14/722,206.68
  6. Step 6: Final answer
    x = 551,868.82

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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.