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Finding the Fourth Proportional to 709,809.90, 979,524.81 and 403,879.65

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Solution

The fourth proportional to 709,809.90, 979,524.81 and 403,879.65 is: 557,346.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,809.90 : 979,524.81 = 403,879.65 : x
  2. Step 2: Convert to fraction form
    709,809.90/979,524.81 = 403,879.65/x
  3. Step 3: Cross multiply
    709,809.90x = 979,524.81 × 403,879.65
  4. Step 4: Simplify right side
    709,809.90x = 395,610,137,429.12
  5. Step 5: Solve for x
    x = 395,610,137,429.12/709,809.90
  6. Step 6: Final answer
    x = 557,346.60

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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.