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Finding the Fourth Proportional to 544.02, 815.40 and 415.50

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Solution

The fourth proportional to 544.02, 815.40 and 415.50 is: 622.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.02 : 815.40 = 415.50 : x
  2. Step 2: Convert to fraction form
    544.02/815.40 = 415.50/x
  3. Step 3: Cross multiply
    544.02x = 815.40 × 415.50
  4. Step 4: Simplify right side
    544.02x = 338,798.70
  5. Step 5: Solve for x
    x = 338,798.70/544.02
  6. Step 6: Final answer
    x = 622.77

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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.