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Finding the Fourth Proportional to 721,891.69, 996,198.42 and 399,594.85

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Solution

The fourth proportional to 721,891.69, 996,198.42 and 399,594.85 is: 551,434.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,891.69 : 996,198.42 = 399,594.85 : x
  2. Step 2: Convert to fraction form
    721,891.69/996,198.42 = 399,594.85/x
  3. Step 3: Cross multiply
    721,891.69x = 996,198.42 × 399,594.85
  4. Step 4: Simplify right side
    721,891.69x = 398,075,758,210.14
  5. Step 5: Solve for x
    x = 398,075,758,210.14/721,891.69
  6. Step 6: Final answer
    x = 551,434.19

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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.