Home / 709,982.10-979,780.64-404,081.78

Finding the Fourth Proportional to 709,982.10, 979,780.64 and 404,081.78

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Solution

The fourth proportional to 709,982.10, 979,780.64 and 404,081.78 is: 557,635.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,982.10 : 979,780.64 = 404,081.78 : x
  2. Step 2: Convert to fraction form
    709,982.10/979,780.64 = 404,081.78/x
  3. Step 3: Cross multiply
    709,982.10x = 979,780.64 × 404,081.78
  4. Step 4: Simplify right side
    709,982.10x = 395,911,498,101.43
  5. Step 5: Solve for x
    x = 395,911,498,101.43/709,982.10
  6. Step 6: Final answer
    x = 557,635.89

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1.5x scale

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.