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Finding the Fourth Proportional to 804.22, 1,109.76 and 493.72

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Solution

The fourth proportional to 804.22, 1,109.76 and 493.72 is: 681.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.22 : 1,109.76 = 493.72 : x
  2. Step 2: Convert to fraction form
    804.22/1,109.76 = 493.72/x
  3. Step 3: Cross multiply
    804.22x = 1,109.76 × 493.72
  4. Step 4: Simplify right side
    804.22x = 547,910.71
  5. Step 5: Solve for x
    x = 547,910.71/804.22
  6. Step 6: Final answer
    x = 681.29

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1.5x scale

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.