Home / 979,619.40-1,469,429.10-419,747.40

Finding the Fourth Proportional to 979,619.40, 1,469,429.10 and 419,747.40

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Solution

The fourth proportional to 979,619.40, 1,469,429.10 and 419,747.40 is: 629,621.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,619.40 : 1,469,429.10 = 419,747.40 : x
  2. Step 2: Convert to fraction form
    979,619.40/1,469,429.10 = 419,747.40/x
  3. Step 3: Cross multiply
    979,619.40x = 1,469,429.10 × 419,747.40
  4. Step 4: Simplify right side
    979,619.40x = 616,789,044,209.34
  5. Step 5: Solve for x
    x = 616,789,044,209.34/979,619.40
  6. Step 6: Final answer
    x = 629,621.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.