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Finding the Fourth Proportional to 279,456, 385,678.44 and 158,629.92

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Solution

The fourth proportional to 279,456, 385,678.44 and 158,629.92 is: 218,925.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,456 : 385,678.44 = 158,629.92 : x
  2. Step 2: Convert to fraction form
    279,456/385,678.44 = 158,629.92/x
  3. Step 3: Cross multiply
    279,456x = 385,678.44 × 158,629.92
  4. Step 4: Simplify right side
    279,456x = 61,180,140,082.92
  5. Step 5: Solve for x
    x = 61,180,140,082.92/279,456
  6. Step 6: Final answer
    x = 218,925.84

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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.