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Finding the Fourth Proportional to 1,579.76, 2,179.92 and 950.48

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Solution

The fourth proportional to 1,579.76, 2,179.92 and 950.48 is: 1,311.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,579.76 : 2,179.92 = 950.48 : x
  2. Step 2: Convert to fraction form
    1,579.76/2,179.92 = 950.48/x
  3. Step 3: Cross multiply
    1,579.76x = 2,179.92 × 950.48
  4. Step 4: Simplify right side
    1,579.76x = 2,071,970.36
  5. Step 5: Solve for x
    x = 2,071,970.36/1,579.76
  6. Step 6: Final answer
    x = 1,311.57

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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.