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Finding the Fourth Proportional to 501,278.51, 691,808.09 and 274,967.75

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Solution

The fourth proportional to 501,278.51, 691,808.09 and 274,967.75 is: 379,479.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,278.51 : 691,808.09 = 274,967.75 : x
  2. Step 2: Convert to fraction form
    501,278.51/691,808.09 = 274,967.75/x
  3. Step 3: Cross multiply
    501,278.51x = 691,808.09 × 274,967.75
  4. Step 4: Simplify right side
    501,278.51x = 190,224,914,293.78
  5. Step 5: Solve for x
    x = 190,224,914,293.78/501,278.51
  6. Step 6: Final answer
    x = 379,479.49

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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.