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Finding the Fourth Proportional to 1,105,307, 1,525,323.72 and 628,379

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Solution

The fourth proportional to 1,105,307, 1,525,323.72 and 628,379 is: 867,163.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105,307 : 1,525,323.72 = 628,379 : x
  2. Step 2: Convert to fraction form
    1,105,307/1,525,323.72 = 628,379/x
  3. Step 3: Cross multiply
    1,105,307x = 1,525,323.72 × 628,379
  4. Step 4: Simplify right side
    1,105,307x = 958,481,393,849.88
  5. Step 5: Solve for x
    x = 958,481,393,849.88/1,105,307
  6. Step 6: Final answer
    x = 867,163.05

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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.