Home / 728,955.70-1,005,959.29-406,665.79

Finding the Fourth Proportional to 728,955.70, 1,005,959.29 and 406,665.79

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Solution

The fourth proportional to 728,955.70, 1,005,959.29 and 406,665.79 is: 561,199.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,955.70 : 1,005,959.29 = 406,665.79 : x
  2. Step 2: Convert to fraction form
    728,955.70/1,005,959.29 = 406,665.79/x
  3. Step 3: Cross multiply
    728,955.70x = 1,005,959.29 × 406,665.79
  4. Step 4: Simplify right side
    728,955.70x = 409,089,229,375.69
  5. Step 5: Solve for x
    x = 409,089,229,375.69/728,955.70
  6. Step 6: Final answer
    x = 561,199.03

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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.