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Finding the Fourth Proportional to 1,022.64, 1,411.07 and 580.38

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Solution

The fourth proportional to 1,022.64, 1,411.07 and 580.38 is: 800.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,022.64 : 1,411.07 = 580.38 : x
  2. Step 2: Convert to fraction form
    1,022.64/1,411.07 = 580.38/x
  3. Step 3: Cross multiply
    1,022.64x = 1,411.07 × 580.38
  4. Step 4: Simplify right side
    1,022.64x = 818,953.90
  5. Step 5: Solve for x
    x = 818,953.90/1,022.64
  6. Step 6: Final answer
    x = 800.82

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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.