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Finding the Fourth Proportional to 722,210.32, 996,649.68 and 399,920.41

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Solution

The fourth proportional to 722,210.32, 996,649.68 and 399,920.41 is: 551,889.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,210.32 : 996,649.68 = 399,920.41 : x
  2. Step 2: Convert to fraction form
    722,210.32/996,649.68 = 399,920.41/x
  3. Step 3: Cross multiply
    722,210.32x = 996,649.68 × 399,920.41
  4. Step 4: Simplify right side
    722,210.32x = 398,580,548,651.97
  5. Step 5: Solve for x
    x = 398,580,548,651.97/722,210.32
  6. Step 6: Final answer
    x = 551,889.85

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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.