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Finding the Fourth Proportional to 644,279.68, 889,081.62 and 357,818.22

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Solution

The fourth proportional to 644,279.68, 889,081.62 and 357,818.22 is: 493,775.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,279.68 : 889,081.62 = 357,818.22 : x
  2. Step 2: Convert to fraction form
    644,279.68/889,081.62 = 357,818.22/x
  3. Step 3: Cross multiply
    644,279.68x = 889,081.62 × 357,818.22
  4. Step 4: Simplify right side
    644,279.68x = 318,129,601,361.30
  5. Step 5: Solve for x
    x = 318,129,601,361.30/644,279.68
  6. Step 6: Final answer
    x = 493,775.62

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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.