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Finding the Fourth Proportional to 279,668.72, 385,940.87 and 152,344.32

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Solution

The fourth proportional to 279,668.72, 385,940.87 and 152,344.32 is: 210,234.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,668.72 : 385,940.87 = 152,344.32 : x
  2. Step 2: Convert to fraction form
    279,668.72/385,940.87 = 152,344.32/x
  3. Step 3: Cross multiply
    279,668.72x = 385,940.87 × 152,344.32
  4. Step 4: Simplify right side
    279,668.72x = 58,795,897,762.65
  5. Step 5: Solve for x
    x = 58,795,897,762.65/279,668.72
  6. Step 6: Final answer
    x = 210,234.08

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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.