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Finding the Fourth Proportional to 279,012.64, 385,169.70 and 178,468.96

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Solution

The fourth proportional to 279,012.64, 385,169.70 and 178,468.96 is: 246,371.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,012.64 : 385,169.70 = 178,468.96 : x
  2. Step 2: Convert to fraction form
    279,012.64/385,169.70 = 178,468.96/x
  3. Step 3: Cross multiply
    279,012.64x = 385,169.70 × 178,468.96
  4. Step 4: Simplify right side
    279,012.64x = 68,740,835,782.51
  5. Step 5: Solve for x
    x = 68,740,835,782.51/279,012.64
  6. Step 6: Final answer
    x = 246,371.76

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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.