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Finding the Fourth Proportional to 722,166.99, 996,578.21 and 399,870.15

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Solution

The fourth proportional to 722,166.99, 996,578.21 and 399,870.15 is: 551,814.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,166.99 : 996,578.21 = 399,870.15 : x
  2. Step 2: Convert to fraction form
    722,166.99/996,578.21 = 399,870.15/x
  3. Step 3: Cross multiply
    722,166.99x = 996,578.21 × 399,870.15
  4. Step 4: Simplify right side
    722,166.99x = 398,501,876,320.08
  5. Step 5: Solve for x
    x = 398,501,876,320.08/722,166.99
  6. Step 6: Final answer
    x = 551,814.03

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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.