Home / 728,785.07-1,005,720.78-406,494.92

Finding the Fourth Proportional to 728,785.07, 1,005,720.78 and 406,494.92

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Solution

The fourth proportional to 728,785.07, 1,005,720.78 and 406,494.92 is: 560,961.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,785.07 : 1,005,720.78 = 406,494.92 : x
  2. Step 2: Convert to fraction form
    728,785.07/1,005,720.78 = 406,494.92/x
  3. Step 3: Cross multiply
    728,785.07x = 1,005,720.78 × 406,494.92
  4. Step 4: Simplify right side
    728,785.07x = 408,820,388,008.44
  5. Step 5: Solve for x
    x = 408,820,388,008.44/728,785.07
  6. Step 6: Final answer
    x = 560,961.53

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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.