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Finding the Fourth Proportional to 509,179.66, 702,680.30 and 279,751.79

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Solution

The fourth proportional to 509,179.66, 702,680.30 and 279,751.79 is: 386,064.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,179.66 : 702,680.30 = 279,751.79 : x
  2. Step 2: Convert to fraction form
    509,179.66/702,680.30 = 279,751.79/x
  3. Step 3: Cross multiply
    509,179.66x = 702,680.30 × 279,751.79
  4. Step 4: Simplify right side
    509,179.66x = 196,576,071,722.74
  5. Step 5: Solve for x
    x = 196,576,071,722.74/509,179.66
  6. Step 6: Final answer
    x = 386,064.27

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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.