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Finding the Fourth Proportional to 644,398.88, 889,245.72 and 357,937.28

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Solution

The fourth proportional to 644,398.88, 889,245.72 and 357,937.28 is: 493,939.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,398.88 : 889,245.72 = 357,937.28 : x
  2. Step 2: Convert to fraction form
    644,398.88/889,245.72 = 357,937.28/x
  3. Step 3: Cross multiply
    644,398.88x = 889,245.72 × 357,937.28
  4. Step 4: Simplify right side
    644,398.88x = 318,294,194,268.44
  5. Step 5: Solve for x
    x = 318,294,194,268.44/644,398.88
  6. Step 6: Final answer
    x = 493,939.71

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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.