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Finding the Fourth Proportional to 709,780.69, 979,512.21 and 387,504.37

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Solution

The fourth proportional to 709,780.69, 979,512.21 and 387,504.37 is: 534,764.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,780.69 : 979,512.21 = 387,504.37 : x
  2. Step 2: Convert to fraction form
    709,780.69/979,512.21 = 387,504.37/x
  3. Step 3: Cross multiply
    709,780.69x = 979,512.21 × 387,504.37
  4. Step 4: Simplify right side
    709,780.69x = 379,565,261,843.36
  5. Step 5: Solve for x
    x = 379,565,261,843.36/709,780.69
  6. Step 6: Final answer
    x = 534,764.14

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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.