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Finding the Fourth Proportional to 814.64, 1,222.96 and 555.76

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Solution

The fourth proportional to 814.64, 1,222.96 and 555.76 is: 834.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.64 : 1,222.96 = 555.76 : x
  2. Step 2: Convert to fraction form
    814.64/1,222.96 = 555.76/x
  3. Step 3: Cross multiply
    814.64x = 1,222.96 × 555.76
  4. Step 4: Simplify right side
    814.64x = 679,672.25
  5. Step 5: Solve for x
    x = 679,672.25/814.64
  6. Step 6: Final answer
    x = 834.32

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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.