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Finding the Fourth Proportional to 1,412,358.86, 1,949,067.90 and 767,780.30

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Solution

The fourth proportional to 1,412,358.86, 1,949,067.90 and 767,780.30 is: 1,059,543.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412,358.86 : 1,949,067.90 = 767,780.30 : x
  2. Step 2: Convert to fraction form
    1,412,358.86/1,949,067.90 = 767,780.30/x
  3. Step 3: Cross multiply
    1,412,358.86x = 1,949,067.90 × 767,780.30
  4. Step 4: Simplify right side
    1,412,358.86x = 1,496,455,936,982.37
  5. Step 5: Solve for x
    x = 1,496,455,936,982.37/1,412,358.86
  6. Step 6: Final answer
    x = 1,059,543.70

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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.