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Finding the Fourth Proportional to 452.07, 677.80 and 287.66

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Solution

The fourth proportional to 452.07, 677.80 and 287.66 is: 431.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.07 : 677.80 = 287.66 : x
  2. Step 2: Convert to fraction form
    452.07/677.80 = 287.66/x
  3. Step 3: Cross multiply
    452.07x = 677.80 × 287.66
  4. Step 4: Simplify right side
    452.07x = 194,975.95
  5. Step 5: Solve for x
    x = 194,975.95/452.07
  6. Step 6: Final answer
    x = 431.30

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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.