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Finding the Fourth Proportional to 662.49, 914.90 and 429.75

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Solution

The fourth proportional to 662.49, 914.90 and 429.75 is: 593.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.49 : 914.90 = 429.75 : x
  2. Step 2: Convert to fraction form
    662.49/914.90 = 429.75/x
  3. Step 3: Cross multiply
    662.49x = 914.90 × 429.75
  4. Step 4: Simplify right side
    662.49x = 393,178.28
  5. Step 5: Solve for x
    x = 393,178.28/662.49
  6. Step 6: Final answer
    x = 593.49

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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.