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Finding the Fourth Proportional to 279,991.08, 386,389.44 and 152,668.80

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Solution

The fourth proportional to 279,991.08, 386,389.44 and 152,668.80 is: 210,683.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,991.08 : 386,389.44 = 152,668.80 : x
  2. Step 2: Convert to fraction form
    279,991.08/386,389.44 = 152,668.80/x
  3. Step 3: Cross multiply
    279,991.08x = 386,389.44 × 152,668.80
  4. Step 4: Simplify right side
    279,991.08x = 58,989,612,137.47
  5. Step 5: Solve for x
    x = 58,989,612,137.47/279,991.08
  6. Step 6: Final answer
    x = 210,683.90

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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.