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Finding the Fourth Proportional to 644,408.56, 889,284.08 and 357,955.36

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Solution

The fourth proportional to 644,408.56, 889,284.08 and 357,955.36 is: 493,978.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,408.56 : 889,284.08 = 357,955.36 : x
  2. Step 2: Convert to fraction form
    644,408.56/889,284.08 = 357,955.36/x
  3. Step 3: Cross multiply
    644,408.56x = 889,284.08 × 357,955.36
  4. Step 4: Simplify right side
    644,408.56x = 318,324,002,998.67
  5. Step 5: Solve for x
    x = 318,324,002,998.67/644,408.56
  6. Step 6: Final answer
    x = 493,978.55

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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.