Home / 845,380-1,268,235.78-312,905.56

Finding the Fourth Proportional to 845,380, 1,268,235.78 and 312,905.56

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Solution

The fourth proportional to 845,380, 1,268,235.78 and 312,905.56 is: 469,419.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    845,380 : 1,268,235.78 = 312,905.56 : x
  2. Step 2: Convert to fraction form
    845,380/1,268,235.78 = 312,905.56/x
  3. Step 3: Cross multiply
    845,380x = 1,268,235.78 × 312,905.56
  4. Step 4: Simplify right side
    845,380x = 396,838,026,952.94
  5. Step 5: Solve for x
    x = 396,838,026,952.94/845,380
  6. Step 6: Final answer
    x = 469,419.70

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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.