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Finding the Fourth Proportional to 644,277.88, 889,115.52 and 357,824.80

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Solution

The fourth proportional to 644,277.88, 889,115.52 and 357,824.80 is: 493,804.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,277.88 : 889,115.52 = 357,824.80 : x
  2. Step 2: Convert to fraction form
    644,277.88/889,115.52 = 357,824.80/x
  3. Step 3: Cross multiply
    644,277.88x = 889,115.52 × 357,824.80
  4. Step 4: Simplify right side
    644,277.88x = 318,147,583,120.90
  5. Step 5: Solve for x
    x = 318,147,583,120.90/644,277.88
  6. Step 6: Final answer
    x = 493,804.91

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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.