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Finding the Fourth Proportional to 669.14, 1,008.72 and 624.54

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Solution

The fourth proportional to 669.14, 1,008.72 and 624.54 is: 941.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.14 : 1,008.72 = 624.54 : x
  2. Step 2: Convert to fraction form
    669.14/1,008.72 = 624.54/x
  3. Step 3: Cross multiply
    669.14x = 1,008.72 × 624.54
  4. Step 4: Simplify right side
    669.14x = 629,985.99
  5. Step 5: Solve for x
    x = 629,985.99/669.14
  6. Step 6: Final answer
    x = 941.49

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.