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Finding the Fourth Proportional to 1,022.11, 1,410.45 and 580

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Solution

The fourth proportional to 1,022.11, 1,410.45 and 580 is: 800.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,022.11 : 1,410.45 = 580 : x
  2. Step 2: Convert to fraction form
    1,022.11/1,410.45 = 580/x
  3. Step 3: Cross multiply
    1,022.11x = 1,410.45 × 580
  4. Step 4: Simplify right side
    1,022.11x = 818,061
  5. Step 5: Solve for x
    x = 818,061/1,022.11
  6. Step 6: Final answer
    x = 800.36

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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.