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Finding the Fourth Proportional to 644,369.57, 889,205.42 and 357,908.03

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Solution

The fourth proportional to 644,369.57, 889,205.42 and 357,908.03 is: 493,899.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,369.57 : 889,205.42 = 357,908.03 : x
  2. Step 2: Convert to fraction form
    644,369.57/889,205.42 = 357,908.03/x
  3. Step 3: Cross multiply
    644,369.57x = 889,205.42 × 357,908.03
  4. Step 4: Simplify right side
    644,369.57x = 318,253,758,347.98
  5. Step 5: Solve for x
    x = 318,253,758,347.98/644,369.57
  6. Step 6: Final answer
    x = 493,899.42

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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.