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Finding the Fourth Proportional to 814.76, 1,223.04 and 607.28

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Solution

The fourth proportional to 814.76, 1,223.04 and 607.28 is: 911.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.76 : 1,223.04 = 607.28 : x
  2. Step 2: Convert to fraction form
    814.76/1,223.04 = 607.28/x
  3. Step 3: Cross multiply
    814.76x = 1,223.04 × 607.28
  4. Step 4: Simplify right side
    814.76x = 742,727.73
  5. Step 5: Solve for x
    x = 742,727.73/814.76
  6. Step 6: Final answer
    x = 911.59

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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.