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Finding the Fourth Proportional to 279,478.64, 385,555.92 and 188,805.44

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Solution

The fourth proportional to 279,478.64, 385,555.92 and 188,805.44 is: 260,467.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,478.64 : 385,555.92 = 188,805.44 : x
  2. Step 2: Convert to fraction form
    279,478.64/385,555.92 = 188,805.44/x
  3. Step 3: Cross multiply
    279,478.64x = 385,555.92 × 188,805.44
  4. Step 4: Simplify right side
    279,478.64x = 72,795,055,120.20
  5. Step 5: Solve for x
    x = 72,795,055,120.20/279,478.64
  6. Step 6: Final answer
    x = 260,467.33

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1.5x scale

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.