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Finding the Fourth Proportional to 544.55, 815.27 and 415.06

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Solution

The fourth proportional to 544.55, 815.27 and 415.06 is: 621.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.55 : 815.27 = 415.06 : x
  2. Step 2: Convert to fraction form
    544.55/815.27 = 415.06/x
  3. Step 3: Cross multiply
    544.55x = 815.27 × 415.06
  4. Step 4: Simplify right side
    544.55x = 338,381.85
  5. Step 5: Solve for x
    x = 338,381.85/544.55
  6. Step 6: Final answer
    x = 621.40

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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.