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Finding the Fourth Proportional to 452.87, 676.10 and 387.89

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Solution

The fourth proportional to 452.87, 676.10 and 387.89 is: 579.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.87 : 676.10 = 387.89 : x
  2. Step 2: Convert to fraction form
    452.87/676.10 = 387.89/x
  3. Step 3: Cross multiply
    452.87x = 676.10 × 387.89
  4. Step 4: Simplify right side
    452.87x = 262,247.11
  5. Step 5: Solve for x
    x = 262,247.11/452.87
  6. Step 6: Final answer
    x = 579.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.