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Finding the Fourth Proportional to 707,678.05, 976,613.22 and 385,405.68

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Solution

The fourth proportional to 707,678.05, 976,613.22 and 385,405.68 is: 531,869.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,678.05 : 976,613.22 = 385,405.68 : x
  2. Step 2: Convert to fraction form
    707,678.05/976,613.22 = 385,405.68/x
  3. Step 3: Cross multiply
    707,678.05x = 976,613.22 × 385,405.68
  4. Step 4: Simplify right side
    707,678.05x = 376,392,282,151.09
  5. Step 5: Solve for x
    x = 376,392,282,151.09/707,678.05
  6. Step 6: Final answer
    x = 531,869.37

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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.