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Finding the Fourth Proportional to 279,043.64, 385,078.26 and 151,719.32

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Solution

The fourth proportional to 279,043.64, 385,078.26 and 151,719.32 is: 209,371.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,043.64 : 385,078.26 = 151,719.32 : x
  2. Step 2: Convert to fraction form
    279,043.64/385,078.26 = 151,719.32/x
  3. Step 3: Cross multiply
    279,043.64x = 385,078.26 × 151,719.32
  4. Step 4: Simplify right side
    279,043.64x = 58,423,811,753.98
  5. Step 5: Solve for x
    x = 58,423,811,753.98/279,043.64
  6. Step 6: Final answer
    x = 209,371.59

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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.