Home / 709,913.97-979,676.37-387,623.88

Finding the Fourth Proportional to 709,913.97, 979,676.37 and 387,623.88

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Solution

The fourth proportional to 709,913.97, 979,676.37 and 387,623.88 is: 534,918.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,913.97 : 979,676.37 = 387,623.88 : x
  2. Step 2: Convert to fraction form
    709,913.97/979,676.37 = 387,623.88/x
  3. Step 3: Cross multiply
    709,913.97x = 979,676.37 × 387,623.88
  4. Step 4: Simplify right side
    709,913.97x = 379,745,955,683.72
  5. Step 5: Solve for x
    x = 379,745,955,683.72/709,913.97
  6. Step 6: Final answer
    x = 534,918.27

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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.