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Finding the Fourth Proportional to 279,185.25, 385,275.83 and 158,287.89

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Solution

The fourth proportional to 279,185.25, 385,275.83 and 158,287.89 is: 218,437.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,185.25 : 385,275.83 = 158,287.89 : x
  2. Step 2: Convert to fraction form
    279,185.25/385,275.83 = 158,287.89/x
  3. Step 3: Cross multiply
    279,185.25x = 385,275.83 × 158,287.89
  4. Step 4: Simplify right side
    279,185.25x = 60,984,497,407.26
  5. Step 5: Solve for x
    x = 60,984,497,407.26/279,185.25
  6. Step 6: Final answer
    x = 218,437.39

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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.