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Finding the Fourth Proportional to 250,486.80, 345,669.75 and 137,309.28

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Solution

The fourth proportional to 250,486.80, 345,669.75 and 137,309.28 is: 189,485.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,486.80 : 345,669.75 = 137,309.28 : x
  2. Step 2: Convert to fraction form
    250,486.80/345,669.75 = 137,309.28/x
  3. Step 3: Cross multiply
    250,486.80x = 345,669.75 × 137,309.28
  4. Step 4: Simplify right side
    250,486.80x = 47,463,664,490.28
  5. Step 5: Solve for x
    x = 47,463,664,490.28/250,486.80
  6. Step 6: Final answer
    x = 189,485.69

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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.