Home / 728,136.40-1,091,815.80-306,936.40

Finding the Fourth Proportional to 728,136.40, 1,091,815.80 and 306,936.40

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Solution

The fourth proportional to 728,136.40, 1,091,815.80 and 306,936.40 is: 460,240.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,136.40 : 1,091,815.80 = 306,936.40 : x
  2. Step 2: Convert to fraction form
    728,136.40/1,091,815.80 = 306,936.40/x
  3. Step 3: Cross multiply
    728,136.40x = 1,091,815.80 × 306,936.40
  4. Step 4: Simplify right side
    728,136.40x = 335,118,011,115.12
  5. Step 5: Solve for x
    x = 335,118,011,115.12/728,136.40
  6. Step 6: Final answer
    x = 460,240.71

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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.