Home / 728,759.89-1,005,690.39-406,490.86

Finding the Fourth Proportional to 728,759.89, 1,005,690.39 and 406,490.86

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Solution

The fourth proportional to 728,759.89, 1,005,690.39 and 406,490.86 is: 560,958.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,759.89 : 1,005,690.39 = 406,490.86 : x
  2. Step 2: Convert to fraction form
    728,759.89/1,005,690.39 = 406,490.86/x
  3. Step 3: Cross multiply
    728,759.89x = 1,005,690.39 × 406,490.86
  4. Step 4: Simplify right side
    728,759.89x = 408,803,951,524.84
  5. Step 5: Solve for x
    x = 408,803,951,524.84/728,759.89
  6. Step 6: Final answer
    x = 560,958.36

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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.