Home / 728,744.78-1,005,664.46-402,048.90

Finding the Fourth Proportional to 728,744.78, 1,005,664.46 and 402,048.90

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Solution

The fourth proportional to 728,744.78, 1,005,664.46 and 402,048.90 is: 554,825.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,744.78 : 1,005,664.46 = 402,048.90 : x
  2. Step 2: Convert to fraction form
    728,744.78/1,005,664.46 = 402,048.90/x
  3. Step 3: Cross multiply
    728,744.78x = 1,005,664.46 × 402,048.90
  4. Step 4: Simplify right side
    728,744.78x = 404,326,289,912.09
  5. Step 5: Solve for x
    x = 404,326,289,912.09/728,744.78
  6. Step 6: Final answer
    x = 554,825.64

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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.