Home / 728,758.59-1,005,688.20-406,489.56

Finding the Fourth Proportional to 728,758.59, 1,005,688.20 and 406,489.56

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Solution

The fourth proportional to 728,758.59, 1,005,688.20 and 406,489.56 is: 560,956.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,758.59 : 1,005,688.20 = 406,489.56 : x
  2. Step 2: Convert to fraction form
    728,758.59/1,005,688.20 = 406,489.56/x
  3. Step 3: Cross multiply
    728,758.59x = 1,005,688.20 × 406,489.56
  4. Step 4: Simplify right side
    728,758.59x = 408,801,751,668.20
  5. Step 5: Solve for x
    x = 408,801,751,668.20/728,758.59
  6. Step 6: Final answer
    x = 560,956.34

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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.