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Finding the Fourth Proportional to 1,022.56, 1,411.02 and 574.40

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Solution

The fourth proportional to 1,022.56, 1,411.02 and 574.40 is: 792.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,022.56 : 1,411.02 = 574.40 : x
  2. Step 2: Convert to fraction form
    1,022.56/1,411.02 = 574.40/x
  3. Step 3: Cross multiply
    1,022.56x = 1,411.02 × 574.40
  4. Step 4: Simplify right side
    1,022.56x = 810,489.89
  5. Step 5: Solve for x
    x = 810,489.89/1,022.56
  6. Step 6: Final answer
    x = 792.61

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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.