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Finding the Fourth Proportional to 1,021.76, 1,410.24 and 800.48

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Solution

The fourth proportional to 1,021.76, 1,410.24 and 800.48 is: 1,104.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.76 : 1,410.24 = 800.48 : x
  2. Step 2: Convert to fraction form
    1,021.76/1,410.24 = 800.48/x
  3. Step 3: Cross multiply
    1,021.76x = 1,410.24 × 800.48
  4. Step 4: Simplify right side
    1,021.76x = 1,128,868.92
  5. Step 5: Solve for x
    x = 1,128,868.92/1,021.76
  6. Step 6: Final answer
    x = 1,104.83

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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.