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Finding the Fourth Proportional to 279,529.32, 385,738.43 and 158,668.41

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Solution

The fourth proportional to 279,529.32, 385,738.43 and 158,668.41 is: 218,955.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,529.32 : 385,738.43 = 158,668.41 : x
  2. Step 2: Convert to fraction form
    279,529.32/385,738.43 = 158,668.41/x
  3. Step 3: Cross multiply
    279,529.32x = 385,738.43 × 158,668.41
  4. Step 4: Simplify right side
    279,529.32x = 61,204,502,570.65
  5. Step 5: Solve for x
    x = 61,204,502,570.65/279,529.32
  6. Step 6: Final answer
    x = 218,955.57

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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.