Home / 739,218.56-1,020,120.96-399,686

Finding the Fourth Proportional to 739,218.56, 1,020,120.96 and 399,686

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Solution

The fourth proportional to 739,218.56, 1,020,120.96 and 399,686 is: 551,566.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,218.56 : 1,020,120.96 = 399,686 : x
  2. Step 2: Convert to fraction form
    739,218.56/1,020,120.96 = 399,686/x
  3. Step 3: Cross multiply
    739,218.56x = 1,020,120.96 × 399,686
  4. Step 4: Simplify right side
    739,218.56x = 407,728,066,018.56
  5. Step 5: Solve for x
    x = 407,728,066,018.56/739,218.56
  6. Step 6: Final answer
    x = 551,566.33

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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.