Home / 728,243.70-1,005,031.03-422,317.42

Finding the Fourth Proportional to 728,243.70, 1,005,031.03 and 422,317.42

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Solution

The fourth proportional to 728,243.70, 1,005,031.03 and 422,317.42 is: 582,829.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,243.70 : 1,005,031.03 = 422,317.42 : x
  2. Step 2: Convert to fraction form
    728,243.70/1,005,031.03 = 422,317.42/x
  3. Step 3: Cross multiply
    728,243.70x = 1,005,031.03 × 422,317.42
  4. Step 4: Simplify right side
    728,243.70x = 424,442,111,609.54
  5. Step 5: Solve for x
    x = 424,442,111,609.54/728,243.70
  6. Step 6: Final answer
    x = 582,829.78

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Double scale
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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.