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Finding the Fourth Proportional to 814.98, 1,220.55 and 630.84

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Solution

The fourth proportional to 814.98, 1,220.55 and 630.84 is: 944.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.98 : 1,220.55 = 630.84 : x
  2. Step 2: Convert to fraction form
    814.98/1,220.55 = 630.84/x
  3. Step 3: Cross multiply
    814.98x = 1,220.55 × 630.84
  4. Step 4: Simplify right side
    814.98x = 769,971.76
  5. Step 5: Solve for x
    x = 769,971.76/814.98
  6. Step 6: Final answer
    x = 944.77

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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.