Home / 728,481.96-1,090,662.32-386,145.36

Finding the Fourth Proportional to 728,481.96, 1,090,662.32 and 386,145.36

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Solution

The fourth proportional to 728,481.96, 1,090,662.32 and 386,145.36 is: 578,125.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,481.96 : 1,090,662.32 = 386,145.36 : x
  2. Step 2: Convert to fraction form
    728,481.96/1,090,662.32 = 386,145.36/x
  3. Step 3: Cross multiply
    728,481.96x = 1,090,662.32 × 386,145.36
  4. Step 4: Simplify right side
    728,481.96x = 421,154,194,194.84
  5. Step 5: Solve for x
    x = 421,154,194,194.84/728,481.96
  6. Step 6: Final answer
    x = 578,125.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.