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Finding the Fourth Proportional to 814.64, 1,124.32 and 617.82

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Solution

The fourth proportional to 814.64, 1,124.32 and 617.82 is: 852.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.64 : 1,124.32 = 617.82 : x
  2. Step 2: Convert to fraction form
    814.64/1,124.32 = 617.82/x
  3. Step 3: Cross multiply
    814.64x = 1,124.32 × 617.82
  4. Step 4: Simplify right side
    814.64x = 694,627.38
  5. Step 5: Solve for x
    x = 694,627.38/814.64
  6. Step 6: Final answer
    x = 852.68

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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.