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Finding the Fourth Proportional to 279,672.40, 385,919.14 and 157,145.32

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Solution

The fourth proportional to 279,672.40, 385,919.14 and 157,145.32 is: 216,844.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,672.40 : 385,919.14 = 157,145.32 : x
  2. Step 2: Convert to fraction form
    279,672.40/385,919.14 = 157,145.32/x
  3. Step 3: Cross multiply
    279,672.40x = 385,919.14 × 157,145.32
  4. Step 4: Simplify right side
    279,672.40x = 60,645,384,034.10
  5. Step 5: Solve for x
    x = 60,645,384,034.10/279,672.40
  6. Step 6: Final answer
    x = 216,844.37

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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.