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Finding the Fourth Proportional to 816.36, 1,223.32 and 632.88

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Solution

The fourth proportional to 816.36, 1,223.32 and 632.88 is: 948.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.36 : 1,223.32 = 632.88 : x
  2. Step 2: Convert to fraction form
    816.36/1,223.32 = 632.88/x
  3. Step 3: Cross multiply
    816.36x = 1,223.32 × 632.88
  4. Step 4: Simplify right side
    816.36x = 774,214.76
  5. Step 5: Solve for x
    x = 774,214.76/816.36
  6. Step 6: Final answer
    x = 948.37

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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.