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Finding the Fourth Proportional to 1,021.92, 1,410.34 and 579.96

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Solution

The fourth proportional to 1,021.92, 1,410.34 and 579.96 is: 800.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.92 : 1,410.34 = 579.96 : x
  2. Step 2: Convert to fraction form
    1,021.92/1,410.34 = 579.96/x
  3. Step 3: Cross multiply
    1,021.92x = 1,410.34 × 579.96
  4. Step 4: Simplify right side
    1,021.92x = 817,940.79
  5. Step 5: Solve for x
    x = 817,940.79/1,021.92
  6. Step 6: Final answer
    x = 800.40

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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.