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Finding the Fourth Proportional to 279,057, 418,585.92 and 129,215.64

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Solution

The fourth proportional to 279,057, 418,585.92 and 129,215.64 is: 193,823.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,057 : 418,585.92 = 129,215.64 : x
  2. Step 2: Convert to fraction form
    279,057/418,585.92 = 129,215.64/x
  3. Step 3: Cross multiply
    279,057x = 418,585.92 × 129,215.64
  4. Step 4: Simplify right side
    279,057x = 54,087,847,547.79
  5. Step 5: Solve for x
    x = 54,087,847,547.79/279,057
  6. Step 6: Final answer
    x = 193,823.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.