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Finding the Fourth Proportional to 644,279.56, 889,081.44 and 357,818.10

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Solution

The fourth proportional to 644,279.56, 889,081.44 and 357,818.10 is: 493,775.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,279.56 : 889,081.44 = 357,818.10 : x
  2. Step 2: Convert to fraction form
    644,279.56/889,081.44 = 357,818.10/x
  3. Step 3: Cross multiply
    644,279.56x = 889,081.44 × 357,818.10
  4. Step 4: Simplify right side
    644,279.56x = 318,129,431,606.06
  5. Step 5: Solve for x
    x = 318,129,431,606.06/644,279.56
  6. Step 6: Final answer
    x = 493,775.45

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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.