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Finding the Fourth Proportional to 629.67, 943.38 and 561.80

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Solution

The fourth proportional to 629.67, 943.38 and 561.80 is: 841.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.67 : 943.38 = 561.80 : x
  2. Step 2: Convert to fraction form
    629.67/943.38 = 561.80/x
  3. Step 3: Cross multiply
    629.67x = 943.38 × 561.80
  4. Step 4: Simplify right side
    629.67x = 529,990.88
  5. Step 5: Solve for x
    x = 529,990.88/629.67
  6. Step 6: Final answer
    x = 841.70

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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.