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Finding the Fourth Proportional to 707,691.40, 976,620.42 and 385,402.96

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Solution

The fourth proportional to 707,691.40, 976,620.42 and 385,402.96 is: 531,859.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,691.40 : 976,620.42 = 385,402.96 : x
  2. Step 2: Convert to fraction form
    707,691.40/976,620.42 = 385,402.96/x
  3. Step 3: Cross multiply
    707,691.40x = 976,620.42 × 385,402.96
  4. Step 4: Simplify right side
    707,691.40x = 376,392,400,664.44
  5. Step 5: Solve for x
    x = 376,392,400,664.44/707,691.40
  6. Step 6: Final answer
    x = 531,859.51

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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.