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Finding the Fourth Proportional to 1,366.48, 2,048.28 and 879.70

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Solution

The fourth proportional to 1,366.48, 2,048.28 and 879.70 is: 1,318.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.48 : 2,048.28 = 879.70 : x
  2. Step 2: Convert to fraction form
    1,366.48/2,048.28 = 879.70/x
  3. Step 3: Cross multiply
    1,366.48x = 2,048.28 × 879.70
  4. Step 4: Simplify right side
    1,366.48x = 1,801,871.92
  5. Step 5: Solve for x
    x = 1,801,871.92/1,366.48
  6. Step 6: Final answer
    x = 1,318.62

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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.