Home / 728,439.20-1,005,258.56-401,789.72

Finding the Fourth Proportional to 728,439.20, 1,005,258.56 and 401,789.72

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Solution

The fourth proportional to 728,439.20, 1,005,258.56 and 401,789.72 is: 554,476.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,439.20 : 1,005,258.56 = 401,789.72 : x
  2. Step 2: Convert to fraction form
    728,439.20/1,005,258.56 = 401,789.72/x
  3. Step 3: Cross multiply
    728,439.20x = 1,005,258.56 × 401,789.72
  4. Step 4: Simplify right side
    728,439.20x = 403,902,555,350.00
  5. Step 5: Solve for x
    x = 403,902,555,350.00/728,439.20
  6. Step 6: Final answer
    x = 554,476.69

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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.