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Finding the Fourth Proportional to 999,690.69, 1,379,570.11 and 540,805.12

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Solution

The fourth proportional to 999,690.69, 1,379,570.11 and 540,805.12 is: 746,309.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,690.69 : 1,379,570.11 = 540,805.12 : x
  2. Step 2: Convert to fraction form
    999,690.69/1,379,570.11 = 540,805.12/x
  3. Step 3: Cross multiply
    999,690.69x = 1,379,570.11 × 540,805.12
  4. Step 4: Simplify right side
    999,690.69x = 746,078,576,216.18
  5. Step 5: Solve for x
    x = 746,078,576,216.18/999,690.69
  6. Step 6: Final answer
    x = 746,309.42

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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.