Home / 905,619.80-1,358,429.70-485,715.80

Finding the Fourth Proportional to 905,619.80, 1,358,429.70 and 485,715.80

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Solution

The fourth proportional to 905,619.80, 1,358,429.70 and 485,715.80 is: 728,573.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,619.80 : 1,358,429.70 = 485,715.80 : x
  2. Step 2: Convert to fraction form
    905,619.80/1,358,429.70 = 485,715.80/x
  3. Step 3: Cross multiply
    905,619.80x = 1,358,429.70 × 485,715.80
  4. Step 4: Simplify right side
    905,619.80x = 659,810,768,479.26
  5. Step 5: Solve for x
    x = 659,810,768,479.26/905,619.80
  6. Step 6: Final answer
    x = 728,573.70

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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.