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Finding the Fourth Proportional to 554,652.12, 765,376.38 and 312,993.48

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Solution

The fourth proportional to 554,652.12, 765,376.38 and 312,993.48 is: 431,906.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,652.12 : 765,376.38 = 312,993.48 : x
  2. Step 2: Convert to fraction form
    554,652.12/765,376.38 = 312,993.48/x
  3. Step 3: Cross multiply
    554,652.12x = 765,376.38 × 312,993.48
  4. Step 4: Simplify right side
    554,652.12x = 239,557,816,686.00
  5. Step 5: Solve for x
    x = 239,557,816,686.00/554,652.12
  6. Step 6: Final answer
    x = 431,906.43

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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.