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Finding the Fourth Proportional to 554.87, 765.73 and 318.85

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Solution

The fourth proportional to 554.87, 765.73 and 318.85 is: 440.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.87 : 765.73 = 318.85 : x
  2. Step 2: Convert to fraction form
    554.87/765.73 = 318.85/x
  3. Step 3: Cross multiply
    554.87x = 765.73 × 318.85
  4. Step 4: Simplify right side
    554.87x = 244,153.01
  5. Step 5: Solve for x
    x = 244,153.01/554.87
  6. Step 6: Final answer
    x = 440.02

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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.