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Finding the Fourth Proportional to 312,879.05, 431,776.40 and 183,822.92

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Solution

The fourth proportional to 312,879.05, 431,776.40 and 183,822.92 is: 253,677.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,879.05 : 431,776.40 = 183,822.92 : x
  2. Step 2: Convert to fraction form
    312,879.05/431,776.40 = 183,822.92/x
  3. Step 3: Cross multiply
    312,879.05x = 431,776.40 × 183,822.92
  4. Step 4: Simplify right side
    312,879.05x = 79,370,395,557.09
  5. Step 5: Solve for x
    x = 79,370,395,557.09/312,879.05
  6. Step 6: Final answer
    x = 253,677.57

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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.