Home / 728,780.06-1,005,713.89-406,489.93

Finding the Fourth Proportional to 728,780.06, 1,005,713.89 and 406,489.93

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Solution

The fourth proportional to 728,780.06, 1,005,713.89 and 406,489.93 is: 560,954.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,780.06 : 1,005,713.89 = 406,489.93 : x
  2. Step 2: Convert to fraction form
    728,780.06/1,005,713.89 = 406,489.93/x
  3. Step 3: Cross multiply
    728,780.06x = 1,005,713.89 × 406,489.93
  4. Step 4: Simplify right side
    728,780.06x = 408,812,565,215.62
  5. Step 5: Solve for x
    x = 408,812,565,215.62/728,780.06
  6. Step 6: Final answer
    x = 560,954.65

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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.