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Finding the Fourth Proportional to 805.21, 1,110.31 and 584.28

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Solution

The fourth proportional to 805.21, 1,110.31 and 584.28 is: 805.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.21 : 1,110.31 = 584.28 : x
  2. Step 2: Convert to fraction form
    805.21/1,110.31 = 584.28/x
  3. Step 3: Cross multiply
    805.21x = 1,110.31 × 584.28
  4. Step 4: Simplify right side
    805.21x = 648,730.47
  5. Step 5: Solve for x
    x = 648,730.47/805.21
  6. Step 6: Final answer
    x = 805.67

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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.