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Finding the Fourth Proportional to 279,464.80, 385,662.88 and 152,141.30

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Solution

The fourth proportional to 279,464.80, 385,662.88 and 152,141.30 is: 209,955.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,464.80 : 385,662.88 = 152,141.30 : x
  2. Step 2: Convert to fraction form
    279,464.80/385,662.88 = 152,141.30/x
  3. Step 3: Cross multiply
    279,464.80x = 385,662.88 × 152,141.30
  4. Step 4: Simplify right side
    279,464.80x = 58,675,253,079.28
  5. Step 5: Solve for x
    x = 58,675,253,079.28/279,464.80
  6. Step 6: Final answer
    x = 209,955.79

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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.