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Finding the Fourth Proportional to 709,845, 979,671.96 and 403,995.69

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Solution

The fourth proportional to 709,845, 979,671.96 and 403,995.69 is: 557,562.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,845 : 979,671.96 = 403,995.69 : x
  2. Step 2: Convert to fraction form
    709,845/979,671.96 = 403,995.69/x
  3. Step 3: Cross multiply
    709,845x = 979,671.96 × 403,995.69
  4. Step 4: Simplify right side
    709,845x = 395,783,249,453.85
  5. Step 5: Solve for x
    x = 395,783,249,453.85/709,845
  6. Step 6: Final answer
    x = 557,562.92

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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.