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Finding the Fourth Proportional to 452.47, 678.99 and 209.02

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Solution

The fourth proportional to 452.47, 678.99 and 209.02 is: 313.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.47 : 678.99 = 209.02 : x
  2. Step 2: Convert to fraction form
    452.47/678.99 = 209.02/x
  3. Step 3: Cross multiply
    452.47x = 678.99 × 209.02
  4. Step 4: Simplify right side
    452.47x = 141,919.09
  5. Step 5: Solve for x
    x = 141,919.09/452.47
  6. Step 6: Final answer
    x = 313.66

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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.