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Finding the Fourth Proportional to 814.69, 1,222.04 and 670.11

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Solution

The fourth proportional to 814.69, 1,222.04 and 670.11 is: 1,005.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.69 : 1,222.04 = 670.11 : x
  2. Step 2: Convert to fraction form
    814.69/1,222.04 = 670.11/x
  3. Step 3: Cross multiply
    814.69x = 1,222.04 × 670.11
  4. Step 4: Simplify right side
    814.69x = 818,891.76
  5. Step 5: Solve for x
    x = 818,891.76/814.69
  6. Step 6: Final answer
    x = 1,005.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.