Home / 420,560.33-580,365.78-239,268.36

Finding the Fourth Proportional to 420,560.33, 580,365.78 and 239,268.36

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Solution

The fourth proportional to 420,560.33, 580,365.78 and 239,268.36 is: 330,186.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,560.33 : 580,365.78 = 239,268.36 : x
  2. Step 2: Convert to fraction form
    420,560.33/580,365.78 = 239,268.36/x
  3. Step 3: Cross multiply
    420,560.33x = 580,365.78 × 239,268.36
  4. Step 4: Simplify right side
    420,560.33x = 138,863,166,781.83
  5. Step 5: Solve for x
    x = 138,863,166,781.83/420,560.33
  6. Step 6: Final answer
    x = 330,186.08

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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.