Home / 728,722.81-1,005,638.82-406,453.68

Finding the Fourth Proportional to 728,722.81, 1,005,638.82 and 406,453.68

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Solution

The fourth proportional to 728,722.81, 1,005,638.82 and 406,453.68 is: 560,906.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,722.81 : 1,005,638.82 = 406,453.68 : x
  2. Step 2: Convert to fraction form
    728,722.81/1,005,638.82 = 406,453.68/x
  3. Step 3: Cross multiply
    728,722.81x = 1,005,638.82 × 406,453.68
  4. Step 4: Simplify right side
    728,722.81x = 408,745,599,139.86
  5. Step 5: Solve for x
    x = 408,745,599,139.86/728,722.81
  6. Step 6: Final answer
    x = 560,906.83

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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.